Speaking of the exhaust, the most troublesome point on a GM X-frame car is where the headpipe crosses under the frame. We spent extra time massaging a close fit to gain extra ground clearance. You can also see how we detailed the undercarriage of our driver. It's clean, it's functional, but it is not polished. You have to decide how far you want to go. I'm willing to do show-quality work, but I find it tough to get much cleaning done from my lawn chair, which is exactly where I intend to be when I get to a show!