Cylinder Heads
AFR's 185cc SB Ford Enforcer Cylinder heads feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. This budget friendly head is perfect for your 302 to 363 Cubic Inch operating below 6000 RPM. They come fully assembled with the identical components found in our higher end CNC ported cylinder heads; such as ARP rockers studs, PAC Racing springs, Viton valve seals, AFR adjustable guide plates, machined bead valve locks (not stamped), hardened spring cups and our one piece 8mm 21 4N Stainless Steel valves. They are available bare without any parts for the DIY. Sold as a single piece, 2 are required per engine.
| Included Components | |
| As Cast Combustion Chambers | |
| As Cast Exhaust Ports | |
| As Cast Intake Ports | |
|
3-angle Valve Job |
|
| 8mm Bead Lock Intake Valve, 2.020" x 5.000" Overall Valve Length | |
| 8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length | |
| PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500 (upgrades available) | |
| 7° Steel Retainers 1.245" O.D x .885" I.D x .655" I.D | |
| 7° Bead Lock Valve Keepers | |
| ARP 3/8" Rocker Studs | |
| Adjustable 5/16" Guide Plates | |
| Viton Valve Seals .675" O.D x .513" I.D | |
| Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D | |
| 185cc Street Head Flow Chart | ||||||
| .200 | .300 | .400 | .500 | .550 | .600 | |
| Int | 119 | 177 | 225 | 255 | 257 | 260 |
| Exh | 105 | 143 | 163 | 166 | 168 | 170 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
185cc
|
| Intake Port Dimension |
2.010" H x 1.070" W x 5/16 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
64cc
|
| Exhaust Port Dimension |
1.370" H x 1.350" W
|
| Exhaust Port Location |
Stock
|
| Combustion Chamber Size |
64cc
|
| Valve Angle |
20°
|
| Valve Spring Pocket Diameter |
1.540" O.D
|
| Max Valve Spring Pocket Machining |
1.600" O.D
|
| Deck Thickness |
.325"
|
| Minimum Bore Diameter |
4.000"
|
| Flat Mill |
.006" per cc 60cc Max (from 64cc);
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
|
CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. |
|
| Recommended Components: | |
| Intake Port Gasket | |
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket |
AFR #6915
|
| Head Gasket, 302/351W, Fel-Pro #1011-1 | |
| SB Ford 1/2" Bolt Head Bolts, ARP #154-3603 | |
| SB Ford 1/2" Bolt Head Studs, ARP #254-4503 | |
| 1/2" Bolt - 7/16" Thread Head Bolts, 289/302W: ARP 254-3708 | |
| Head Bolt Washers, Manley | |
| Suggested Manifold | |
| Spark Plug Starting Range |
Autolite 3924
|
Our largest and highest flowing head for the small block ford is the best in-line head money can buy. Featuring 220cc intake runners, this package is recommended for race applications and radical "Pro-Street" builds. Available with 58cc or 72cc combustions chambers, you can further customize your setup with our various components upgrades and available machining options.
| Included Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
|
Competition 5-angle Valve Job |
|
| 8mm Bead Lock Intake Valve 2.100" x 5.000" O.A.L. | |
| 8mm Bead Lock Exhaust Valve 1.570" x 5.030" O.A.L. | |
| PAC Racing Spring 1.550" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710" maximum lift, Max RPM 7200-7400 | |
| 10° Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D | |
| 10° Bead Lock Keepers with lashcap recess | |
| ARP 7/16" Rocker Studs | |
| Adjustable 5/16" Guide Plates | |
| Viton Valve Seals .600" O.D x .495" I.D | |
| Hardened Valve Spring I.D Locator 1.550" O.D x .705" I.D | |
| Ductile Iron Intake Valve Seats 2.131" O.D x 1.680" I.D x .375" Deep | |
| Ductile Iron Exhaust Valve Seats 1.650" O.D x 1.350" I.D x .375" Deep | |
| 8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L | |
| 220cc Street Head Flow Chart | |||||||
| .200 | .300 | .400 | .500 | .600 | .700 | .800 | |
| Int | 135 | 194 | 258 | 295 | 315 | 325 | 331 |
| Exh | 121 | 171 | 215 | 238 | 245 | 249 | 250 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.155", 3/4" radius plate exhaust, 1 7/8" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
220cc
|
| Intake Port Dimension |
2.265" H x 1.325" W x 3/8 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
70cc
|
| Exhaust Port Dimension |
1.445" H x 1.595" W
|
| Exhaust Port Location |
Raised .375"
|
| Combustion Chamber Size |
58cc or 72cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
20°
|
| Valve Spring Pocket Diameter |
1.580" O.D
|
| Max Valve Spring Pocket Machining |
1.580" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.000"
|
| Flat Mill |
.006" per cc 55cc Max (from 58cc); 69cc Max (from 72cc);
|
| Angle Mill |
.009" per 52cc Max (from 58cc); 66cc Max (from 72cc);
|
| Minimum Cross Sectional Area |
2.345 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
| CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. | |
| Head Bolt Diameter |
1/2"
|
| Recommended Components: | |
| Intake Port Gasket, Fel-Pro #1262R | |
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket, Fel-Pro #1487 | |
| Head Gasket, 302/351W, Fel-Pro #1011-1 | |
| SB Ford 1/2" Bolt Head Bolt Kit, ARP #154-3603 | |
| SB Ford 1/2" Bolt Head Stud Kit, ARP #254-4503 | |
| 1/2" Bolt - 7/16" Thread Head Bolts, 289/302W: ARP 254-3708 | |
| Head Bolt Washer Kit, Manley | |
| Stud Girdle | |
| Suggested Manifold |
Super Vic or Vic Jr.
|
| Spark Plug Starting Range |
Autolite 3922 - Race Gas
|
| Spark Plug Starting Range |
Autolite 3924 - Pump Gas
|
AFR's 205cc "Competition" cylinder heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. Recommended for race applications and very agressive street/strip builds operating up to 7400 RPM. Maximum intake flow potential @0.750" lift is 331 CFM.
| Basic Package Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
|
Competition 5-angle Valve Job |
|
| 8mm Bead Lock Intake Valve, 2.080" x 5.000" Overall Valve Length | |
| 8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length | |
| PAC Racing Spring 1.550" OD Solid Roller Dual Valve Spring, 220 lbs on seat, .710" maximum lift, Max RPM 7200-7400 (upgrades available) | |
| 10° Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D | |
| 10° Bead Lock Valve Keepers with lashcap recess | |
| ARP 7/16" Rocker Studs | |
| Adjustable 5/16" Guide Plates | |
| Viton Valve Seals .600" O.D x .495" I.D | |
| Hardened Valve Spring I.D Locator 1.550" O.D x .705" I.D | |
| Ductile Iron Intake Valve Seats 2.131" O.D x 1.680" I.D x .375" Deep | |
| Ductile Iron Exhaust Valve Seats 1.650" O.D x 1.350" I.D x .375" Deep | |
| 8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L | |
| 205cc Street Head Flow Chart | ||||||||
| .200 | .300 | .400 | .500 | .550 | .600 | .700 | .750 | |
| Int | 139 | 199 | 251 | 285 | 297 | 308 | 317 | 320 |
| Exh | 121 | 170 | 206 | 219 | 227 | 230 | 232 | 234 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
205cc
|
| Intake Port Dimension |
2.115" H x 1.300" W x 3/8 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
70cc
|
| Exhaust Port Dimension |
1.400" H x 1.400" W
|
| Exhaust Port Location |
Raised .125"
|
| Combustion Chamber Size |
58cc or 72cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
20°
|
| Valve Spring Pocket Diameter |
1.580" O.D
|
| Max Valve Spring Pocket Machining |
1.625" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.000"
|
| Flat Mill |
.006" per cc 54cc Max (from 58cc); 68cc Max (from 72cc);
|
| Angle Mill |
.009" per cc 48cc Max (from 58cc); 62cc Max (from 72cc);
|
| Minimum Cross Sectional Area |
2.165 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
| CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. | |
| Head Bolt Diameter |
1/2"
|
| Recommended Components: | |
| Intake Port Gasket, 1.200" X 2.000" w/ 3/8" radius, Fel-Pro #1262 | |
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket, Fel-Pro #1487 | |
| Head Gasket, Fel-Pro #1011-1 | |
| SB Ford 1/2" Bolt Head Bolt Kit, ARP #154-3603 | |
| SB Ford 1/2" Bolt Head Stud Kit, ARP #254-4503 | |
| 1/2" Bolt - 7/16" Thread Head Bolts, ARP 254-3708 | |
| Head Bolt Washer Kit, Manley | |
| Stud Girdle | |
| Suggested Manifold |
Super Vic or Vic Jr.
|
| Spark Plug Starting Range |
Autolite 3922 - Race Gas
|
| Spark Plug Starting Range |
Autolite 3924 - Pump Gas
|
AFR's 185cc SB Ford Enforcer Cylinder heads feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. In addition, these heads utilize a 1.900” Intake valve and are compatible with OEM piston valve relief. This budget friendly head is perfect for your 302 to 363 Cubic Inch engine operating below 6000 RPM. They come fully assembled with the identical components found in our higher end CNC ported cylinder heads, such as ARP rockers studs, PAC Racing springs, Viton valve seals, AFR adjustable guide plates, machined bead valve locks (not stamped), hardened spring cups and our one-piece 8mm 21 4N Stainless Steel valves. They are available bare and without any parts for the DIY.
| Included Components | |
| As Cast Combustion Chambers | |
| As Cast Exhaust Ports | |
| As Cast Intake Ports | |
|
3-angle Valve Job |
|
| 8mm Bead Lock Intake Valve, 1.900" x 5.000" Overall Valve Length | |
| 8mm Bead Lock Exhaust Valve, 1.600" x 5.030" Overall Valve Length | |
| PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500 (upgrades available) | |
| 7° Steel Retainers 1.245" O.D x .885" I.D x .655" I.D | |
| 7° Bead Lock Valve Keepers | |
| ARP 3/8" Rocker Studs | |
| Adjustable 5/16" Guide Plates | |
| Viton Valve Seals .675" O.D x .513" I.D | |
| Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D | |
| 185cc Street Head Flow Chart | ||||||
| .200 | .300 | .400 | .500 | .550 | .600 | |
| Int | 123 | 175 | 208 | 232 | 242 | 251 |
| Exh | 105 | 143 | 163 | 166 | 168 | 170 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
185cc
|
| Intake Port Dimension |
2.010" H x 1.070" W x 5/16 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
64cc
|
| Exhaust Port Dimension |
1.370" H x 1.350" W
|
| Exhaust Port Location |
Stock
|
| Combustion Chamber Size |
64cc
|
| Valve Angle |
20°
|
| Valve Spring Pocket Diameter |
1.540" O.D
|
| Max Valve Spring Pocket Machining |
1.600" O.D
|
| Deck Thickness |
.325"
|
| Minimum Bore Diameter |
4.000"
|
| Flat Mill |
.006" per cc 53cc Max (from 63cc);
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
|
CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. |
|
| Recommended Components: | |
| Intake Port Gasket | |
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket |
AFR #6915
|
| Head Gasket, 302/351W, Fel-Pro #1011-1 | |
| SB Ford 1/2" Bolt Head Bolts, ARP #154-3603 | |
| SB Ford 1/2" Bolt Head Studs, ARP #254-4503 | |
| 1/2" Bolt - 7/16" Thread Head Bolts, 289/302W: ARP 254-3708 | |
| Head Bolt Washers, Manley | |
| Suggested Manifold | |
| Spark Plug Starting Range |
Autolite 3924
|
| Basic Package Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
| Competition 5-angle Valve Job | |
| 8mm Bead Lock Intake Valve, 2.050" x 4.903" Overall Valve Length, Stud mount | |
| 8mm Bead Lock Exhaust Valve, 1.600" x 4.950" Overall Valve Length | |
| PAC Racing Spring 1.270" OD Hydraulic Roller Dual Valve Spring, 155 lbs. on seat, .650" maximum lift, Max RPM 7000-7200 | |
| 7° Chrome Moly Retainers | |
| 7° Bead Lock Valve Keepers | |
| ARP 7/16" Rocker Studs | |
| Adjustable 5/16" Guide Plates | |
| Viton Valve Seals | |
| Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D | |
| Ductile Iron Intake Valve Seats 2.131" O.D x 1.680" I.D x .375" Deep | |
| Ductile Iron Exhaust Valve Seats 1.650" O.D x 1.350" I.D x .375" Deep | |
| Bronze Valve Guides | |
| Thermactor Air Injector Reducer Bushing (5/8"-11 x 7/16"-14) | |
| 195cc Competition Head Flow Chart | |||||||
| .200 | .300 | .400 | .500 | .550 | .600 | .650 | |
| Int | 148 | 201 | 255 | 283 | 292 | 294 | 298 |
| Exh | 126 | 171 | 207 | 222 | 227 | 231 | 235 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
195cc
|
| Intake Port Dimension |
2.060" H x 1.220" W 11/32 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
70cc
|
| Exhaust Port Dimension |
1.405" H x 1.400" W
|
| Exhaust Port Location |
Raised .125"
|
| Combustion Chamber Size |
58cc or 72cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
20°
|
| Valve Spring Pocket Diameter |
1.460" O.D
|
| Max Valve Spring Pocket Machining |
1.625" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.000"
|
| Flat Mill |
.006" per cc 54cc Max (from 58cc); 68cc Max (from 72cc);
|
| Angle Mill |
.009" per cc 54cc Max (from 58cc); 68cc Max (from 72cc);
|
| Minimum Cross Sectional Area |
2.075 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
| CARB Status:This product is not legal for sale or use on emission-controlled vehicles and intended for dedicated race vehicles only. | |
| Head Bolt Diameter |
1/2"
|
| Recommended Components: | |
| Intake Port Gasket, 1.200" X 2.000" w/ 3/8" radius, Fel-Pro #1262 | |
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket, Fel-Pro #1487 | |
| Head Gasket, Fel-Pro #1011-1 | |
| SB Ford 1/2" Bolt Head Bolt Kit, ARP #154-3603 | |
| SB Ford 1/2" Bolt Head Stud Kit, ARP #254-4503 | |
| 1/2" Bolt - 7/16" Thread Head Bolts | |
| Head Bolt Washer Kit, Manley | |
| Stud Girdle | |
| Suggested Manifold |
RPM Performer or Vic Jr.
|
| Spark Plug Starting Range |
Autolite 3924
|
AFR's 185cc SB Ford "Street" cylinder heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout. Recommended for engines from 302-393 cubic inches, operating up to 6000-6500 RPM. Legal for 1995 and older emissions controlled vehicles under CARB EO #D-250-3. Not compatible with OEM pistons.
| Included Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
|
Competition 5-angle Valve Job |
|
| 8mm Bead Lock Intake Valve 2.020" x 4.900" O.A.L. | |
| 8mm Bead Lock Exhaust Valve 1.600" x 4.950" O.A.L. | |
| Pedastal 8mm Bead Lock Intake Valve 2.020" x 5.080" O.A.L | |
| Pedastal 8mm Bead Lock Exhaust Valve 1.600" x 5.100" O.A.L | |
| PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500, less than 235* duration, upgraded spring #8019 recommended for higher RPM & larger cams | |
| 7° Manley Steel Retainers 1.245" O.D x .885" I.D x .655" I.D | |
| 7° Bead Lock Valve Keepers | |
| ARP 3/8" Rocker Studs | |
| Adjustable 5/16" Guide Plates | |
| Viton Valve Seals .600" O.D x .495" I.D | |
| Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D | |
| Ductile Iron Intake Valve Seats 2.131" O.D x 1.680" I.D x .375" Deep | |
| Ductile Iron Exhaust Valve Seats 1.650" O.D x 1.350" I.D x .375" Deep | |
| 8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L | |
| Thermactor Air Injector Reducer Bushing (5/8"-11 x 7/16"-14) | |
| 185cc Street Head Flow Chart | ||||||
| .200 | .300 | .400 | .500 | .550 | .600 | |
| Int | 142 | 195 | 247 | 276 | 285 | 289 |
| Exh | 118 | 164 | 200 | 210 | 213 | 215 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
185cc
|
| Intake Port Dimension |
2.045" H x 1.205" W x 3/8 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
70cc
|
| Exhaust Port Dimension |
1.355" H x 1.360" W
|
| Exhaust Port Location |
Stock
|
| Combustion Chamber Size |
58cc or 72cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
20°
|
| Valve Spring Pocket Diameter |
1.460" O.D
|
| Max Valve Spring Pocket Machining |
1.625" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.000"
|
| Flat Mill |
.006" per cc 54cc Max (from 58cc); 68cc Max (from 72cc);
|
| Angle Mill |
.009" per cc 48cc Max (from 58cc); 62cc Max (from 72cc)
|
| Note:Angle mills might require a .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
2.025 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
| Head Bolt Diameter |
1/2"
|
| CARB E.O# Part #'s 1422 & 1492 |
D-250-3
|
| Recommended Components: | |
| Intake Port Gasket, Fel-Pro #1262 | |
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket, Fel-Pro #1415 |
AFR #6837
|
| Head Gasket, 302/351W, Fel-Pro #1011-1 | |
| SB Ford 1/2" Bolt Head Bolts, ARP #154-3603 | |
| SB Ford 1/2" Bolt Head Studs, ARP #254-4503 | |
| 1/2" Bolt - 7/16" Thread Head Bolts, 289/302W: ARP 254-3708 | |
| Head Bolt Washers, Manley | |
| Stud Girdle | |
| Suggested Manifold |
Performer or Performer RPM
|
| Spark Plug Starting Range |
Autolite 3924
|
AFR's 165cc "Street" cylinder heads are the preferred choice over re-worked factory heads. They feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout, in addition these are the only AFR heads that are compatible with the OEM piston valve relief. Recommended for street, towing, or street/strip engines with displacements up to 351 cubic inches, operating up to 6000 RPM. Legal for 1995 and older emissions controlled vehicles under CARB EO #D-250-3.
| Basic Package Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
|
Competition 5-angle Valve Job |
|
| 8mm Bead Lock Intake Valve, 1.900" x 4.900" O.A.L | |
| 8mm Bead Lock Exhaust Valve, 1.600" x 4.950" O.A.L | |
| Pedestal 8mm Bead Lock Intake Valve, 1.900" x 5.080" O.A.L | |
| Pedestal 8mm Bead Lock Exhaust Valve, 1.600" x 5.100" O.A.L | |
| PAC Racing Spring 1.290" OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600" maximum lift, Max RPM 6300-6500, less than 235* duration, upgraded spring #8019 recommended for higher RPM & larger cams | |
| 7° Steel Retainers 1.245" O.D x .885" I.D x .655" I.D | |
| 7° Bead Lock Valve Keepers | |
| ARP 3/8" Rocker Studs | |
| Adjustable 5/16" Guide Plates | |
| Viton Valve Seals .600" O.D x .495" I.D | |
| Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D | |
| Ductile Iron Intake Valve Seats 2.131" O.D x 1.680" I.D x .375" Deep | |
| Ductile Iron Exhaust Valve Seats 1.650" O.D x 1.350" I.D x .375" Deep | |
| 8 mm Bronze Valve Guides .502" O.D x 2.100" O.A.L | |
| Thermactor Air Injector Reducer Bushing (5/8"-11 x 7/16"-14) | |
| 165cc Street Head Flow Chart | ||||||
| .200 | .300 | .400 | .500 | .550 | .600 | |
| Int | 135 | 200 | 240 | 251 | 255 | 260 |
| Exh | 122 | 163 | 192 | 208 | 212 | 215 |
Test conducted at 28" of water (pressure) on Superflow 1020
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
165cc
|
| Intake Port Dimension |
1.975" H x 1.125" W x 3/8 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
68cc
|
| Exhaust Port Dimension |
1.355" H x 1.360" W
|
| Exhaust Port Location |
Stock
|
| Combustion Chamber Size |
58cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
20°
|
| Valve Spring Pocket Diameter |
1.460" O.D
|
| Max Valve Spring Pocket Machining |
1.625" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.000"
|
| Flat Mill |
.006" per cc 54cc Maximum
|
| Angle Mill |
.009" per cc 48cc Maximum
|
| Note:Angle mills might require a .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
1.935 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
| CARB EO# Part #'s 1402 & 1472 |
D-250-3
|
| Head Bolt Diameter 1402 & 1472 |
1/2"
|
| Head Bolt Diameter 1399 |
1/2"
|
| Recommended Components: | |
| Intake Port Gasket | |
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket | |
| Head Gasket, 302/351 Windsor, Fel-Pro #1011-1 | |
| SBF 7/16" Head Bolt Kit, ARP #154-3701 | |
| SBF 7/16" Bolt, Head Stud Kit, ARP #254-4401 | |
| 1/2" Bolt - 7/16" Thread Head Bolts, ARP 254-3708 | |
| Head Bolt Washer Kit, Manley | |
| Stud Girdle (AFR Specific) | |
| Suggested Manifold |
Performer or Performer RPM
|
| Spark Plug Starting Range |
Autolite 3924
|
You’ll be first to know about Air Flow Research products, discounts and special events!
