Harley Davidson Evolution Heads

Harley Davidson Evolution Heads Thermal Coated Heads Pistons.

Harley davidson evolution heads. Fully ported Hayabusa head. Most MEGAFLO prepared STDs are. Here is a matching set of genuine original Harley-Davidson Evo Evolution Heads.

R. The Evolution engine is an air-cooled 45-degree V-twin engine manufactured from 1984 by Harley-Davidson for the companys motorcycles. The stock valve seats are 1633 ID.

1838 Intake and 142 Exhaust. 1200 Performer Cylinder Heads for Evolution Sportster have superior flow for maximum power. This head came off an 80 CID engine that produced 101 horsepower.

SCREAMIN EAGLE EVOLUTION 1340 CYLINDER HEADS Built right at the factory for unparalleled quality. R. Harley-Davidson Heritage Softail.

Of seat pressure stainless steel valveschrome moly retainers and seals. Will Fit in stock chassis. 1983 To avoid betting the farm on Evo the shovel was kept in production for a time.

Using the latest CAD technology we design and develop high flowing intake and exhaust ports for various Harley-Davidson cylinder heads. The re-designed combustion chamber optimized for flow and efficiency works with stock or Hi-Compression Forged Piston Kits. 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.