How long is too long for intake manifolds?

Matthew Westberg /

as the Topic says: How long is too long for a replacement intake manifold?

The stock manifold on my ped is about a half inch long, not very long at all! With a pipe several inches long I know it'll affect performance, but how long is too long for a manifold? When and how exactly might it affect performance?

Re: How long is too long for intake manifolds?

I had some one at a performance shop give me this tip. They said start long, in your case maybe a couple of inches, run your bike, then cut off a little bit at a time and keep testing. Once you determine which length worked best, you can make a permanent one at that length. Good luck.

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