Bodies on nitro-powered vehicles are trimmed to provide clearance for the stinger and to ensure that exhaust gases that come out of the pipe make they way outside the body. If you don’t leave enough room between the stinger and body, you risk damaging the tuned pipe’s stinger. The Lexan that the body is made of can actually saw its way into the aluminum of the stinger. The hole that is created can affect the tune of the stinger and weaken it. Make sure you leave at least an 1/8-inch gap around the stinger. With the hole the proper size there is no way the body will rub against the stinger on your tuned pipe.
—Kevin Hetmanski, Technical editor, www.rccaraction.com