blk350on20s
Active member
- Joined
- Jul 5, 2011
- Messages
- 2,720
- Reaction score
- 0
You can port a stock manifold but it only opens the inlet and outlet. There are runners in the manifold itself which block a lot of air. They are cutting tops off now as erik said and machining the runners out. Once thats done its a free flowing manifold. If it were mine id go 60 hp or 30% nozzles. People have had great luck with these and tow powers.