215cc LSX Mongoose Street Aluminum Cylinder Head

The Medium Port, High Velocity Torque Monster

In keeping up with the GM's trend of larger bore sizes and increased displacement, AFR is proud to release our 215cc LS1/LS2/LS6 version of our popular Gen III product line which is aimed specifically to maximize 4” bore combinations (364 - 408 CID). However this head is very versatile and could also be considered for aggressive 346 applications and should also be a prime consideration in larger stroker motors as well (415-430 CID) if the focus of the build is more aimed at enhancing street performance than all out strip performance (where our 225 or 240 cc offerings potentially make more sense). This is a very effective design offering serious velocity while still being able to provide a significant volume of airflow enough to generate well over 600 HP at the crank. This head will also work well on any forced induction or nitrous applications from 346 - 408 CID; larger engines should look to our 225 offering. Note the AFR 215 requires a minimum head gasket bore of 4.135 regardless of bore size and is a direct bolt on requiring no special parts (see footnotes here). It of course comes equipped with AFR's trademark 3/4” thick deck and thicker port and combustion chamber surfaces as well. If you're looking to see that a blue oval in your rear view mirror instead of your windshield, look no further than the AFR 215.

Note:

Hydraulic roller cams in "LS" Gen III engines typcially experience valve float at 6600-6800 RPM's. If you are using aftermarket rocker arms valve float will become prominent and AFR highly recommends upgrading to our #8019 spring. If you plan on running over .600 gross valve lift and/or 6600 RPM, AFR suggests you upgrade your springs to AFR part #8019. Our upgrade spring has higher seat and open pressures (155/410+) to better reduce the risk of valve float in more aggressive applications.

FYI:

215cc LSX Aluminum Cylinder Head Flow Chart

Tested on 4.060 Bore.

AFR #7207 Bead Lock Intake Valve, 2.020” standard length

AFR #7228 Bead Lock Exhaust Valve, 1.600” staindard length

AFR #8017 1.290” OD Hydraulic Valve Spring with dampener, 135 lbs. on seat, .600: maximum lift

AFR #8512 7° 1.250 Titanium Retainers

AFR #9007 7° Bead Lock Valve Keepers

AFR #6612 Viton Valve Seals

AFR #8042 Hardened Spring Cup

AFR #9059 Intake Valve Seats

AFR #9069 Exhaust Valve Seats

AFR #9051 Bronze Valve Guides

AFR #6859 or GM#12558573 Exhaust Port Gasket Fel-Pro #1440

AFR #6847 Head Gasket Fel-Pro #1041

AFR #6848 Cometic Head Gasket

AFR #6330 6 pt. Head Bolts

AFR #6331 6 pt. Head Studs

AFR #6332 12 pt. Head Studs

AFR #6328 Head Bolt Washers

AFR #6329 Head Bolt Washers

Note: Milling head deck will affect flow numbers.