Using the reducers supplied with Dougs header kit, we installed Flowmasters 2.5-inch, mandrel-bent American Thunder exhaust kit. The kit fits so well that we were able to get this nearly perfect fit installing it ourselves with the car on four jackstands. A car hoist and fancy power tools are definitely not needed. Look for an upcoming article for the skinny on the full installation. Its impossible to describe how awesome it sounds, but well try anyway. The throaty sound can be turned on and off at will, depending on how much throttle you deem necessary. The 50-series mufflers should have kept things quiet enough to dart past Officer Friendly, but our lack of hood and valid registration tags got us nabbed anyway.