No matter what you're driving, you want it to perform at its best. That's why MBRP offers the Performance Series Turbo-Back Exhaust System for the 5.9 Cummins 1989-1993. This system is constructed from 4" aluminized steel and features a 3.5" turbo downpipe for maximum performance. It also has a 3 year warranty, so you can be confident in its quality. The rich, mellow exhaust note will make your Cummins sound great, and the mirror polished, T304 stainless steel exhaust tip looks great, too. With common hand tools, this system is easy to install - so you can get back on the road in no time.