Hello guys , i will be making a custom exhaust for my car (BPU++) ,This is from the turbo to the back ,there will be no cat and muffler installed. Should i go 4 inch or 3,5 inch ?Thanks
This is completely false. You will NOT lose low end power. The turbo itself creates backpressure. Bigger is better when it comes to piping size.supralover93 said:damn with a 4" you will have no backpressure and no low end. i would go with a 3-3.5".
:dunno: when i took my cat-back off and ran w/open dp my car felt like shit in the lower rpm's and didn't pick up until about 3-3500.cwtt said:This is completely false. You will NOT lose low end power. The turbo itself creates backpressure. Bigger is better when it comes to piping size.
Well, if it was a track only car that would work. It would create massive noise (not a good sounding exhaust - noise), it would vibrate your teeth, it would cook the paint under the car and make a funny smell, and you'd get stopped by the police every three blocks. Same reasons Mustang, Vette guys don't run open headers on the street.idrewfelix said:exactly, then why not just dissconnect everything off from the downpipe and create the least restrictive exaust system possible?