Classic Derby Cover / Evolution 3 Hole, Chrome or Black

A billet 3 hole derby cover for Harley-Davidson Evolution engines, offered in chrome or twice cut black.

Evolution primaries use the earlier three hole derby pattern, and clean billet replacements for them are getting harder to find. Thrashin machines this one from 6061 aluminum and includes the gasket. The chrome is hand polished. The black is hard anodized and then sent back through the machine for a twice cut finish that leaves bright edges against the dark face.

Features

• 6061 aircraft grade aluminum construction
• Three hole design for Evolution engine primaries
• Chrome is hand polished, black is hard anodized and twice cut
• Gasket included
• Made in Los Angeles, CA

Fitment

• Harley-Davidson Evolution engine models using the three hole derby cover pattern

Note: Thrashin Supply publishes no model year range for this cover, only the Evolution engine and three hole pattern. Check your primary against the three hole pattern before ordering.

About Thrashin Supply

Thrashin Supply Co. machines its billet parts from 6061 aircraft grade aluminum in the United States, much of it in Los Angeles. The line is built around controls, risers and foot hardware for riders who want the touch points on a Harley-Davidson to feel deliberate instead of stock.

Works With

Later Twin Cam and Milwaukee-Eight primaries use a five hole pattern. For those, see the Classic Derby Cover Chrome 5 Hole. On the same Evolution engine, the Points Cover / Twin Cam & Evolution matches.