AFR 210 LS1 Enforcer Cylinder Heads: More Airflow for Small-Bore LS Engines

So you have a 5.3L LS truck engine that’s in good shape and ready for some performance upgrades, but you have to watch your pennies. You could rework a set of the high-flow factory 243 or 799 heads from an LS6 or LQ9 engine. But for about the same amount of money—and a lot less effort—you can have a pair of AFR 210 LS1 Enforcer Cylinder Heads that offer great airflow and are ready to bolt on right out of the box.

The 210 LS1 Enforcer heads are cast from A356 aluminum using AFR’s permanent mold “as-cast” technology to accurately locate the 210cc intake runners, 82cc exhaust runners, and 64cc combustion chambers. AFR assembles the heads with the same parts it uses for its CNC-machined heads including 1.290-inch PAC Racing dual springs; one-piece 2.000-inch intake and 1.570-inch stainless steel valves; chromoly retainers and machined bead valve locks; hardened spring seats; and ductile iron seats. That’s a lot of quality for your money.

The AFR 210 LS1 Enforcer Cylinder Heads are also available as bare castings.

Specifications
• Intake Runners: 210cc
• Exhaust Runners: 82cc
• Combustion Chambers: 64cc
• Valve Sizes: 2.000" intake/1.570" exhaust
• Valve Springs: 1.290" dual for hydraulic roller cams, .600" maximum lift
• Valve Spring Retainers: 7° chromoly
• Valve Locks: 7° machined steel
• Valve Guides: bronze
• Minimum Bore Size: 3.780"

Airflow Chart
Lift                   .200  .300  .400  .500  .550  .600
Intake (CFM)      136   199    246    272   276    265
Exhaust (CFM)    93    140    180    204   211     215
Test conducted at 28" of water (pressure) on Superflow 600 flow bench
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe

SEE AFR’S 210 LS1 ENFORCER CYLINDER HEADS AT SUMMIT RACING