Exhaust systems

[carrottop]

Hi all im still running a stock exhuast on my silvia 1.8t and am finding it very restrictive, could any one explain some performance exhaust options as i have heard an s13 exhaust fits with some modification could anyone explain the mods cheers

[northerner]

Best to get one made from a local Stainelss Exhaust manufacturer. I too have a standard system and just by changing the recirc backbox you could gain about 10/15 bhp and better throttle response