I installed this kit myself back in 2009. The quality control was bad. I recieved two different sets of mufflers due to them being dented up pretty bad.
The quality of the materials are great. The fit, is subpar. You really have to fight to get the mufflers adjusted to get the tips level. Unfortunately, I could never get the tips level. The driver side one was really bad. The gap from the top of the oval tip to the cutout in the rear bumber was rediculous. About 2" or more.
Plus, the oval tips did not look better than the OEM quad exhaust.
My fix, I took the car to a muffler shop. They tried to straighten the mufflers on their lift with no luck. So I told them I was going to order a set of polished stainless steel dual tips for each side. This would give me my quad look back. Luck would have it, the shop actually had the in one out two tips in stock. They were also a little bit bigger than the OEM quad tips. That's what I wanted.
Anyways, the muffler shop had to cut off the mufflers and weld them on straight. Then they had to tack the tips, measure, adjust and then once they looked straight and level they welded them on up.
Since the modifications I couldn't be happier. The car looks great with the quads back on, plus these are bigger and shinier. The car sounds great. I would say if you mated a Mustang and 370Z together, you would get the sound this exhaust makes.
If I were to do it over, I would go with the Stillen kit.
http://www.stillen.com/product/exhaust/ ... 11951.html
I would still swap the tips out for the quad look either way.
Good luck with this exhaust kit guys!
Jim