2007 GMC Yukon Exhaust Install - New Truck, New Pipes Photo Gallery
2. The tailpipe and muffler assembly from JBA is not only constructed entirely out of stainless steel, but it also features the company's straight-through muffler for lower backpressure and increased flow. You will also notice the absence of the rear muffler that the factory uses. JBA spent a lot of time in the R&D department to keep the exhaust note quiet yet still make power without the use of one more restrictive muffler.