Looking to buy a Y pipe for 05 g35 coupe. Trying to keep around $200 budget. Like the shape of the Stillen, although the Stillen doesn't have the flex joints. Is that a big deal? Also, are we outletting into a 2.5" or 3" pipe? Most aftermarket have 3" outlet but I have seen some with 2.5". Best to match I hear. Also hear longer down pipes are better, but not sure on that.

Any suggestions?