2011-2015 Duramax LML 5" Downpipe Back Dual Exhaust No Muffler (531013)2011 2015 Duramax LML 5" Downpipe Back Dual Exhaust No Muffler (531013) 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! IMPORTANT NOTE: The turbo

Duramax/Cummins PPE Race Fuel Valve (113073000)

Mahle offers OE specifications and fitment and is a direct replacement for all your OE Gaskets and Seals

Twister Muffler 51299 / 51600The Twister Muffler 51299 / 51600 by Flo-Pro is a universal muffler add-on for any 4 or 5" exhaust system

7L Hamilton Cams Tappets (07-t-001)

7L Air-Boss 67 Grid Heater Delete gives the largest flow increase possible short of milling the cast plenum off of the head and going to a fabricated intake such as the ZZ Fab or Hellman unit

6L Duramax with the Clevite CB-1805P P-Series Rod Bearing (Standard)

Injectors balanced to much tighter tolerances than from the OEM

4L Melling High Volume Replacement Oil Pump (M452HV)

This filter upgrade features an extended filter cup that houses 57% larger specially engineered 10-micron filtration media

3L KC300x Stage 1 Turbocharger 63mm/68mm (300234)

4L 3-1/2" DPF Race Pipe (421001)

instead of through the fuel injectors