I like the looks and sound of the HMF slip ons. I want to add one (Red) to my 2007 650i.

Since I do not know much about the subject, will I have to have it re-jetted...???

 

it would be a good idea to rejet, and to get an aftermarket air filter. i dont recomend a k&n filter though..let in too many small particles for me. i have an HMF utility and love the tone! just rejet($60) so you get the max power from your $300+ pipe.

 

Thanks!!!