I picked up a pair of the long tube Headman headers from Panoz, and put them on this weekend. To get them to fit, I moved the oil filter canister forward of the alternator, and rerouted the clutch cable. They bolted straight up and had lots of clearance around the frame and steering linage. I've got a pair of 2 1/2" dia. x 24" long Dynamax bullet mufflers to finish the exhaust system. The car goes to the muffler shop tomorrow to get it all welded up.
I plan to have the car dyno tuned after the exhaust system is complete to see if I picked up any power at the high end. My hope is that I've removed some restrictions from the exhaust, and that it breaths better. If I pick up 15 hp, I'll be happy.
During the past month I put the GTRA on a diet. I've removed 60 lbs from the car, and have set up the 30 gal fuel cell so I can run it half full. That should save another 100 lbs. The 160 lbs reduction is about a 6% reduction in the car's weight. It's not the full 200 lbs I was looking for, but it's better than getting heavier. A 5% increase in hp and 6% reduction in wieght should be a noticable improvement in the car's performance.
My first race is March 5 thru 7 at Arroyo Seco. I'm really looking forward to getting back on the track and seeing how the improvements translate to lower lap times. I'll post dyno results once I have them. Previusly the car made 350 ft-lbs and 315 rwhp.