i ordered a prodrive axleback and have the bosal 3in catback right now...i dont have the stock rear pipe anymore... i was wondering if mounting the prodrive which is 2.5 up to the rear/center pipe of 3 would be a problem. any help would be appreciated. and if it is a problem, willing to trade bosal for 2.5 center pipe

 

you will not get as better exhaust flow as the full 3" exaust system, but i do not think there will be any problem for your car

 

try to keep it all 3" . The 2.5" would restrict power, but it wont actually hurt your car.

 

Flush the Prodrive and get a Stromung