Re: Exhaust,
I'm beginning to think I should've gone with a 4" round muffler instead of the bullet, or maybe something a little larger than just a 4x9" standard length main muffler. It's perfectly fine, but just a tad quieter would be preferred. I'm wondering if there are any resonated tips out there that might fit the bill... I haven't seen much in the way of 2.5"ID tips though...
Oh, one more thing, that's actually somewhat annoying... I did install a gasket, and it seals fine, but it still sounds like it has an exhaust leak. I'm pretty sure it doesn't(haven't confirmed yet) though, and it might be because of the thin walled pipe used for the downpipe extension? Or at least that's the only reason I can come up with. Or maybe my porting of the stuff has thinned the walls of the downpipe and/or manifold so much at the flanges that they transfer more sound. I'll have to take a closer look. It's just that when I'm at low speeds/low throttle openings/idling there's a lot of exhaust leak sound that comes from the downpipe area, and I hear it more than the actual exhaust in those situations.
That being said, between the exhaust, cleaned 16v injectors(tossed them in last week without the FPR), and (possibly) the 3 deg. advance mod, I managed a best ever 25.67mpg. Previous best 4 have been 24.0, 24.0, 23.2 and one other 23. So that was cool. I can't wait to get a 2.5bar fpr on there, hopefully tomorrow or monday at the latest. I might also look into doing some aero mods underneath. I really really need to get at LEAST my Bilsteins installed up front, if not both them and the GT springs before Friday... Blah.