i dont have the stillen on my car yet (i dont have any exhaust on my caar yet) but i can tell you just by looking at them both, the stillen will flow better than the greddy. the way the pipes bend from the h-pipe to the mufflars cans are very different between the two. the greddy kinda goes almost perfectly sideways, while the stillen has a slight bend to it (say greddy has a 90degree bend, while stillen has 45degree bend). must say the greddy sounded good, but i still dont like the bigass tips. look good straight back though, must say that much.
