1989-1993 Cummins 5.9L 4" Turbo Back Exhaust System No Muffler (411113 / 412120)1989 1993 Cummins 5. 9L 4" Turbo Back Exhaust System No Muffler (411113 412120) Constructed out of 16 gauge aluminized steel or T409 Stainless, this exhaust system is designed to simplify installation with included clamps, preweld contour bends and improved flanges. Enjoy a noticeable boost in performance, lowered EGTs and amplified air flow with this Mel's system. For powerhouse performance, Mel's delivers horsepower you can hear!

9L Stage 4 Injector Set (DDP9498-4)

2008 - 2010 Ford Superduty 6

The shape and increased surface area of each individual blade

High-Quality Casting: Built to handle intense stress and heat cycles

We took the pair on a 900-mile loop through city traffic

2019-2024 Cummins 6

1989-2004 Cummins 5

LMM & LML this will be a "bigger" compressor wheel by the numbers

Viscosity typical of 15W-50

5-2002 Cummins 5

This means not only do you get more power

You already have