Products

225cc LS1 Mongoose Strip Aluminum Cylinder Heads

The Ultimate Bolt-On Emission Legal Street/Strip Weapon

AFR 225 LS1 Cylinder HeadsFor the maximum high performing street/strip LS1/LS2/LS6 aluminum cylinder heads AFR’s all new 225cc emission legal E/O #D250-4 are hands down the best choice. Specifically designed for 1997 to present Gen-3 Chevy Corvettes, Camaros, and trucks. AFR’s LS1 cylinder head offers unmatched flow performance and features 2.080 intake and 1.600 exhaust valves with AFR’s iron ductile interlocking valve seats. Our 225cc cylinder head is ideal for normally aspirated 396C.I. to 427C.I. For a wild 346 ci the 225 is a good choice, however some low RPM loss of torque might occur. It is available with 62cc, 65cc, and 72cc combustion chambers. AFR’s LS1 is a direct bolt on, no special parts required (see footnotes here). Structural features like Air Flow Research’s trademark 3/4” thick head deck, a must for blown and nitrous applications, reinforced rocker stud bosses and thick wall runners provide unparalled durability. An exclusive new modern combination chamber design with double quench pad area helps the LS1 generate huge low and mid lift airflow numbers. If you need a snake charmer for that pesky neighborhood “Cobra Mustang” look no further!

Note:

AFR highly recomends the use of Crane or GM Billet lifters in conjunction with our #8019 spring.

LS1 Info

 


225cc Large Bore LS1 Aluminum Cylinder Head Flow Chart

225cc LS1 Big Bore Flow Chart

 

225cc Small Bore LS1 Aluminum Cylinder Head Flow Chart

LS1 Small Bore Flow Chart

 

 


225cc Mongoose LS1 Aluminum Racing Cylinder Head Part Numbers

CNC Ported Pairs of Heads Complete With Parts or Ready to Install

CNC Street Porting

 Description

 Part Number

225cc Large Bore CNC Ported w/ parts 62cc 1610
225cc Large Bore CNC Ported w/o parts 62cc 1620
225cc Large Bore CNC Ported w/ parts 72cc 1630
225cc Large Bore CNC Ported w/o parts 72cc 1640
225cc Small Bore CNC Ported w/ parts 65cc 1660
225cc Small Bore CNC Ported w/o parts 65cc 1670


Basic Package Components Part #
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
3-angle Radiused Valve Job
Intake Valve, 2.080" standard length AFR #7208
Exhaust Valve, 1.600" staindard length AFR #7228
1.270" OD Hydraulic Valve Spring with dampener,
155 lbs. on seat, .650" maximum lift
AFR #8019
7° 1.250 Titanium Retainers AFR #8512
7° Valve Locks AFR#9007
Valve Seals AFR #6612
Spring Cup AFR #8042
Intake Valve Seats AFR #9059
Exhaust Valve Seats AFR#9069
Bronze Valve Guides AFR#9051

 

Specifications, Features, and Optional Supporting Components
Head Torque 11MM ARP 70ft. lbs. w/ Moly 8mm 23ft. lbs. w/ Moly
Exhaust Port Gasket GM#12558573/Fel-Pro #1440 AFR #6859
Intake Port Volume 225cc
Intake Valve Size 2.080
Exhaust Port Volume 85cc
Head Gasket Fel-Pro #1041, AFR #6847
Cometic AFR #6846 & #6848
Head Bolts & Studs Standard ARP, AFR #6330, #6331 & #6332
Head Bolt Washers Standard ARP, AFR #6328 & #6329
Jesel or TD Shaft Mount  
Suggested Manifold LS6 or FAST, TPIS
Spark Plug Starting Range

AC 41-974 Platinum

Combustion Chambers 62cc, 65cc, or 72cc
Spring Pocket 1.250 -can be machined to 1.450 OD  
Valve Spacing Stock
Rocker Arms Stock
Valve Angle Stock
Angle Mill (milling options available) .008" per cc
Flat Mill (milling options available) .006" per cc



Note: Milling head deck will affect flow numbers



AIR FLOW RESEARCH | 28611 W. Industry Drive | VALENCIA, CA 91355 | 661-257-8124

Terms, Policies and Warranties
©1997-2001Airflow Research All Rights Reserved