#155 - 14cc, 25/24, Mild Porting, .805" Spring Height



Give yourself a cost-effective boost in performance with this mildly ported, 14cc head.

The intake chamber is smaller, giving you a cost effective boost in HP. The areas around the valves has been unshrouded.

The intake port is mildly ported and the sharp edge of short side radius has been touched. 

Both inside and exhaust valves have face back-cuts to improve flow. 

10.8 lb. green stripe springs are set at .805" (It just came out that way without incurring much additional expense AND it give you a touch more RPM. After all, we're looking at economy performance upgrades here.) 

Coil bind @ .440" lift. 

Valves are lapped and leak checked.