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Message: <blockquote data-quote="Chris Stephens" data-source="post: 1485758" data-attributes="member: 24095">I got the Mustang started last night! [MEDIA=youtube]CpaW7o8C_hw[/MEDIA]I took my time and made sure everything looked decently nice and, most importantly, would work properly. I didn't want to spend a bunch of time chasing gremlins because I didn't do things right in the first place. I guess I did well enough with it, because I finally got to take it for a test drive last night to the gas station and then over to the exhaust shop this morning!I definitely wasn't gonna choke down a 635hp engine with the old 2.5" X Pipe kit I had before. And that 2.3" flange on the header wasn't gonna cut it either. It got treated to a pair of V Band clamps on the collectors, 3" pipe with X, DynoMax Race Bullets, and turn downs. I have a pretty great exhaust guy...he's a little gruff, definitely not the go-to guy for a show car, but if you want a good, cheap exhaust, he's the man! Because I knew routing a 3" exhaust and massive X-Pipe around the driveshaft, DS loop, cross member, torque arm, etc, was going to be a pain without going too low to clear speedbumps and some parking lots, I actually gave them permission to remove the driveshaft loop (it's not really needed with a torque arm) or even just install the 3" pipes and Race Bullets without the X pipe (I figure I wouldn't notice power loss or anything from not having it)...but they made it work and still look pretty good. Shouldn't hang much lower than anything else on the car either. [ATTACH=full]10511[/ATTACH] [ATTACH=full]10512[/ATTACH] I haven't heard it run with the new exhaust yet, the exhaust guy just sent me these photos, so I may hate the way it sounds lol...but at least it ought to be a little quieter and still make good power. The most important thing about getting the exhaust was tuning. The O2 sensor installs into the collector, so with open headers, it doesn't read the exhaust properly, it just reads fully lean. I went in and shut the Closed Loop and the Learn off completely, and thankfully the idle and lower RPM tuning that we did on the dyno was good enough to drive it on. Now I can really start tuning the stuff we couldn't do easily on the dyno, like part throttle, acceleration enrichment, etc. The first AutoCross with this new setup is in two weeks, then its first track event is June 17 and 18! Not a ton of time to drive it and make sure all the bugs are worked out, but hopefully just enough.</blockquote>