K&B outboard tuned pipe

[Jeremyhines]

Wanted u shaped tuned pipe and header for 3.5 outboard. Aluminum or composite ok .

 

[Jeremyhines]

I got pipes can anyone explain how to tune them to motor

 

[john v]

start off as long as you can get it then start to shorten the pipe in 1/8'' increments until it will fall off the pipe and wont come up to top rpms, at this point the pipe is too short and pull the pipe out and this is a good spot to run it. kind of a generic way to tune a pipe, there are a lot of things that will affect pipe length such as prop, fuel, motor height and water conditions. i think the method i gave you should work