What comes first

[chopper]

I'm replacing all exhaust. Also am going to do some engine work.Does it matter weather I do the Cam etc... first, or the exhaust. In other words, am I making extra work if I do the exhaust first?. Yes I am doing the Headers. Thanks----Tom.

[XSELER8]

Post this in Technical

[hdflstf]

The only double work is the retune each step of the way to get the best performance..