TWIN CAM PERFORMER RPM HEADS
The ultimate heads for idle to 6000 rpm power... Performer RPM CNC-ported heads provide superior flow for maximum horses and torque. Twin Cam heads #1694 and
#1697 have an 88cc combustion chamber that's great for stroker kits or engines with a turbo or supercharger. We recommend Edelbrock/JE pistons for 95-inch
engines; other engine sizes require modified stock or other aftermarket pistons.
EVO BIG TWIN PERFORMER HEADS
These emissions legal heads are a direct replacement with stock heads for true, bolt-on performance in 80-inch bikes for great low-end torque. They provide a
substantial power increase while working within the existing rpm range of the stock engine (idle to 5500 rpm) with stock pistons and valvetrain. The intake ports are
raised .125" for improved flow and velocity. Important Note: Performer heads are designed for flat top pistons only. Valve spring specs: maximum valve lift .580",
1.460" OD with dampener, installed seat pressure 165 lbs., installed height 1.730".
EVO BIG TWIN PERFORMER RPM HEADS
The ultimate heads for idle to 6000+ rpm power in 80-inch and larger engines...Performer RPM CNC-ported heads provide superior flow for maximum power.
Performer RPM Evo Big Twin heads #1604, #1624 and #16041 have an 88cc combustion chamber that's great for stroker kits or engines with a turbo or supercharger.
We recommend Edelbrock/JE pistons for 80-inch Evo engines with Performer RPM heads, other engine sizes require modified stock or other aftermarket pistons.
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EVO SPORTSTER PERFORMER RPM HEADS
These Edelbrock Performer RPM heads are designed to give high-performance 1200cc Sportsters® gut wrenching horsepower. Important Notes: Because these
heads come with larger valves, you must modify or change the stock pistons to achieve optimum power and bottom end torque. These heads locate the carb higher
up and closer to the engine. We recommend Edelbrock/JE pistons for 1200cc engines; other engines require modified stock or other aftermarket pistons.
BIG-BORE PERFORMER RPM HEADS
These heads were designed from the ground up for big bore motors. They feature extra large intake valves with added spacing between valves for radical camshafts.
Completely CNC-ported throughout in the combustion chamber, intake port and exhaust port, these heads deliver major power. To get advertised S&S
compression ratios, use Edelbrock #3021 (83cc) for S&S 100-inch 4" bore combination. For 107- and 113-inch S&S combinations use Edelbrock
#3022 (92cc). Your compression ratio may vary; contact your engine builder for recommendations.
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