The wheels, tires and suspension upgrades in combination with the idler arm bushing replacement turned this into a completely different car. Of course anything was better than the 20 year old parts that were on it.The Mindtrain exhaust definately improved power. Mindtrain claims 20-25 hp increase. I haven't dyno'd it, but, my seat of the pants guage tells me hp was increased significantly. A stock '83 with a 12a engine is rated at 101 hp. That isn't bad for a 2400 lb car.The next few pages contain pictures including a wheel closeup and a rear perspective.