Oh who can help me? I'm running 13psi on my cobra with just the front lowered. The car doesn't grip up at all it's embarrasing, I took it to the track and only ran a 13.3 at best. The car will roast the tires all the way through first and pretty much second untill it starts to wheel hop. I was thinking about buying the hard launch bar and urethane bushings from rpmoulet, but will these really help? and are there other mods out there for the IRS? Other then that, but what I don't want to do because I'm not planning on making this car into an all out dragster, was buying a solid axle rearend. I'de like to through some slicks on the car and take it to the track now and again, but I know it won't grip and slicks will just rip the axles in half. For all you 11 sec peeps are you running the IRS? Or did you just swap it out?