i juss had a muffler shop made custom exhaust for me. but its to quiet and it doest have an aggresive tone. its pretty much straight pipe no resonator. how much hp or torque can i gain frum diz.

 

what size is the piping?

 

Its 3inch starting frum the catalytic to muffler with no resonator.

 

Because it's after the cat, I'd say just about the same as every other aftermarked cat-back - about 8-12hp.

 

^ Agreed, the most you can pull from a very well bent catback is 12. The area of the exhaust that is constricting would be the catyletic convertor area. I would suggest an up-pipe, and a downpipe to you if you are looking for an agressive tone, but with the straight pipe it will be loud !

Rush

 

the gains are probably minimal but if you really want to know then thats why dynos were made

 

dynos are probably costly and hard to find but if you really want to ask questions thats why forums were made

 

i think if its a custom catback you maybe might have another 5-9 whp no more then that

 

How on earth can a 3 in. straight pipe be quiet?!
I had a 3 in. straight pipe axleback on the stock exhaust setup and that thing woke up the entire neighborhood every morning.