These reasonably priced AFR 210cc intake port small block Chevy are state of the art performance heads
The 1054 heads feature the Race Ready version with 100% CNC ported intake & exhaust runners as well as the combustion chambers
210cc intake ports and 80cc exhaust ports with a 3/4” thick head deck (ideal for nitrous or blower applications).
Standard valves are lightweight 8mm 2.080" intake and 1.600" exhaust with AFR’s hardened ductile iron interlocking valve seats.
1.550" solid roller valve springs standard - .710" max lift
Angle plug location standard - 65cc combustion chamber
The exceptional flow characteristics make for serious power
23° valve angle and standard valve spacing make this the perfect head for 350 to 400 cid engines in bracket drag cars, sportsman oval trackers and highly modified street class cars operating between 3000 and 7500 rpm (higher rpm ranges possible depending on combination of parts)
No special parts are required
Dual valve cover bolt pattern is standard
The 1054 cylinder heads feature standard exhaust spacing
Exhaust port is raised .250" over GM L98 cyilnder heads