These heads use oversized stock seat stainless valves. 31mm intake 27.5mm exhaust

Price includes:

-heads, valves, seats, springs, rockers, valve cover gasket

Heads are made upon order and can take to approximately 8 weeks to make

Heads are built using brand new castings

Good for 7500 rpm. Contact us if you want different springs

These are perfect for the model 30 engine (12.5-16hp) or if you want to bump up compression on a model 35-38 engine (18-23hp), they have a much smaller chamber. Check out our FAQ page.

These ports aren't as good as model 38 heads (21-23hp) but still have their place in certain applications. They require 12.5-20hp intake flanges and a 20hp intake if you want to run a double barrel carb. The photos are of model 38 heads but its basically the same head with a smaller chamber and a different intake port