Harley Davidson Evolution Heads

The newly designed Harley-Davidson Evo engine relied on aluminum heads and cylinders - as opposed to the heavy cast iron parts of the Shovelhead their previous Big Twin bike V-Twin engine and other predecessors such as the Sportsters Ironhead engine led to a light weight engine with improved air-cooling efficiency.

Harley davidson evolution heads. R. This head came off an 80 CID engine that produced 101 horsepower. Harley Davidson Shovel Heads.

R. SS EVO ported and flowed heads Honda 65 Clone Race Kart Head. It appears someone tried to put larger valves in the blasted head.

When the company wanted a smaller engine to use in its Sportster family the Evolution 883 was the answer. Includes 1051 forged pistons pins clips rings aluminum nickel-silicon carbide plated 3875 inch bore SILVER finish cylinders and head and base gaskets for Harley Davidson Big Twin Evolution 1340cc. Early Evolution heads were sand-cast in alloy.

Contrary to what many performance shops try to tell you we were able to break the 90 horsepower mark without larger valves porting and polishing the Evolution heads. I prepare cylinder heads for Pan Heads Shovelheads Iron and Evolution Sportsters Evolution Big Twins and of course the newest Twin Cam motor. The dirty one is stock and the one that has been blasted has some work done on it.

Stage Two Evolution Harley-Davidson engines involve any stage one changes plus changes to some internal bolt-on engine components. 1340 FORGED PISTONS - 1051 010. Rear 16720-84A and Front 16721-84A.

Harley Davidson Evolution Heads Thermal Coated Heads Pistons. The re-designed combustion chamber optimized for flow and efficiency works with stock or Hi-Compression Forged Piston Kits. 62cc combustion chamber 1850 intake1610exhaust 575max valve lift 165 LBS.