Has anybody had any fitment issues with the gen 2 ture dual exhaust esp with headers and/ or hfcs? I'm about to replace an xo exhaust with a used stillen kit and I hope I don't have problems matching it to the cats. I had a minor issue with the xo but the flex pipe help fit the problem and I don't think the stillen exhaust has the flex pipe sections.

 

I had the stillen true dual exhuast on my 2003 350Z, it worked fine with stock cats, as well as Crawford high-flow cats. With the crawford HFCs, I ran it with stock headers and with crawford headers, I didn't have any fitment issues.

I did have to put about 3 washers under between each of the 4 screws for the M-brace underneath, to make enough room so the exhaust wouldn't hit it under engine torque.

 

Hi I'm z.italy (manuel) from Italy and i have an europeean 350z 04 coupe. I'm visiting your forum in order to learn something about future mods i want to make. I was thinking about buying a stillen true dual exhaust, stillen headers & stillen catalizers but someone told me a true dual is good if you have in mind turbo mods; if not, it's not the best choice because i will loose counterpressure. So they advise me to buy a single path exhaust with Y pipe to gain counterpressure. Anyway they afirm that, in some cases, after change the exhaust system you looses HP instead of gaining. It's that true? they say, for gaining HP after exhaust system mods, yuo need to flash the ECU, if not it's been worthless. thanks
ps:I was thinking about stillen single path with Y pipe, does anyone knows it?