AFR 225cc LS1 Mongoose Strip Head

225cc LS1 Mongoose Strip Aluminum Cylinder Heads

225cc Large Bore CNC Ported 72cc

Completely assembled heads ready to bolt on.

Price is for a pair.

For 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.

Basic Package Components:

• 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

Recommended parts list:

• 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