Exhaust Flange Bolt/Nut

Your exhaust system is made up of several components, beginning with the exhaust manifold. Your exhaust manifold has one port per cylinder at the top, and an exhaust flange at the bottom. The exhaust flange is a single port that carries the exhaust from the separate cylinders into a single pipe through the rest of the exhaust system. Many factory exhaust manifolds are cast iron or aluminum, and may include studs or bolts to attach the flange to the exhaust pipe. Because your exhaust system is under the vehicle, these exhaust flange bolts, nuts, or studs can rust, and may break if removed. This can cause exhaust leaks and performance problems if not addressed. If you've broken your exhaust flange bolts or studs, check out your options at O'Reilly Auto Parts.