Mel's Manufacturing 4" Turbo Back Single Outlet Exhaust 89-93 Dodge 5.9L Cummins

That's right, this is a true 4" turbo back exhaust system for the 1st Generation Cummins trucks. Featuring a large machined flange to adapt the turbo outlet to the downpipe, this system is sure to outflow any other system on the market. This kit is also available either with or without a muffler for those wanting a complete unrestricted sound and flow.