ok so i had it dyno tuned for vance and hines slip ons. but now i built these custom pipes i figure it generates more restriction which means richer running. and we all know harley has to make em lean when they tune. so do i need to re dyno for these pipes???

 

I would just run it the way it is and check your plugs in about 300 miles or so.

 

I would spend the money on finish.

 

i am going to have them chromed doc ock, definitely not leaving them rusted lol