AFR 1531 - LS Chevy 215cc LSX Mongoose Street/Strip Aluminum Cylinder Heads-Pair


This is an unassembled bare cylinder head with valve guides and valve seats installed only. 

Does NOT include any parts such as valves, springs, spring components, studs or guide plates.

LS1/LS2/LS6 Chevy 215cc LSX Mongoose Basic Package Components
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
Competition 5-Angle Valve Job
Intake Valve Size - 2.020'' (Valve not included)
Exhaust Valve Size - 1.600'' (Valve not included)
Hardened Spring Cups
Intake Valve Seats
Exhaust Valve Seats
Bronze Valve Guides
LS1/LS2/LS6 Chevy 215cc LSX Mongoose Street/Strip Head Specifications
Head Torque w/Moly Lube11mm ARP 70 Ft. Lbs. / 8mm 23 Ft. Lbs.
Intake Port Volume215cc
Exhaust Port Volume86cc
Exhaust Port GasketFel Pro 375-1440
Head GasketFel Pro 375-1041 
Cometic 033-6848
Head Bolts & StudsStandard ARP
Head Bolt WashersStandard ARP
Shaft Mount Rocker ArmsYella Terra Ultralite p/n 033-6038
Suggested ManifoldLS6 or FAST p/n 244-54039B
Spark Plug Starting RangeAC 41-974 Platinum
Combustion Chambers65cc
Spring Pocket can be cut to 1.525, no deeper.
Valve SpacingStock
Rocker ArmsStock
Valve AngleStock
Flat Mill.006'' per cc

In keeping up with GM's trend of larger bore sizes and increased displacement, AFR offers this 215cc LS1/LS2/LS6 version of this ever popular Gen III product line which is aimed specifically to maximize 4.000'' bore combinations, 364 - 408ci. However this head is very versatile and could also be considered for aggressive 346 applications. The 215cc head should also be a prime consideration in larger stroker motors as well around 415-430ci, if the focus of the build is more aimed at enhancing street performance than all out strip performance (where AFR's 230 or 240cc 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 600hp at the crank. This head will also work well on any forced induction or nitrous applications from 346-408ci; larger engines should look to the 230cc offering. Note that the AFR 215cc requires a minimum head gasket bore of 4.135'' regardless of bore size and is a direct bolt on requiring no special parts. It of course comes equipped with AFR's trademark 3/4'' thick deck and thicker port and combustion chamber surfaces as well. Made in USA.

Installation Notes: LSX bead locks and aftermarket bead locks are not interchangeable. GM made their bead lock radius and depth different. AFR locks are the same as GM LSX.
Hydraulic roller cams in ''LS'' Gen III engines typcially experience valve float at 6600-6800 RPM's. If you are using aftermarket rocker arms, plan on running over .600'' gross valve lift, or if you are revving beyond 6600 RPM valve float will become prominent. AFR suggests you upgrade your springs to AFR p/n 033-8019. This upgrade spring has higher seat and open pressures (155/410+) to better reduce the risk of valve float in more aggressive applications.

215cc LSX Mongoose Street/Strip Cylinder Head Features:
  • 100% CNC Ported Combustion Chambers
  • 100% CNC Ported Exhaust Ports
  • 100% CNC Ported Intake Ports
  • Competition 5-angle Valve Job
  • 215cc Intake Ports
  • 86cc Exhaust Port
  • 65cc Combustion Chambers
  • Bead Lock Intake Valve, 2.020'' x 4.907'' Overall Valve Length
  • Bead Lock Exhaust Valve, 1.600'' x 4.907'' Overall Valve Length
  • PAC Racing Valve Spring: 1.290'' OD Hydraulic Roller Dual Valve Spring, 135 lbs on seat, .600'' maximum lift, Max RPM 6300-6500
  • 7° 1.250'' Titanium Retainers
  • 7° Bead Lock Valve Keepers
  • Viton Valve Seals
  • Hardened Spring Cup
  • Intake Valve Seats
  • Exhaust Valve Seats
  • Bronze Valve Guides 

  • Picture for reference only.