your backbox(the muffler at the back/end of the exhaust) is removed and straight through pipes fitted.Kbs133 wrote:Stupid questionof the day... what is a back box delete.
Please humour me I am a newbie
makes the car louder etc but I've heard from a few people that it just ends up farting and not sounds too good at lower revs. I'd rather get the backbox modded so it opens it up a bit.