I've got a 306bhp Wagon with a Prodrive BB (decat centre, Prodrive Sportscat DP and STi Uppipe, etc). However, I do 95% motorway miles and I'm getting tired of the exhaust drone when crusing along.

If I went back to the standard (twin exit) WRX backbox, would I need a remap again? People often say that the BB either gives between zero and 5 bhp gain, so would taking it away cause any issues?

Cheers
Richard.

 

not for just the BB
but i thought the prodrive 1 was just as quiet as the o.e

 

It's a fair bit noiser - or at least mine is - when AndyF did my remap he thought I had something a lot more potent fitted.

 

he'd probably been sniffing the meths again