1999-2003 Powerstroke 7.3L 4" Turbo Back Exhaust Cab & Chassis w/ Muffler (421113)1999 2003 Powerstroke 7. 3L 4" Turbo Back Exhaust Cab & Chassis w Muffler (421113) 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!

4L together whether you're building a tow rig

all on stock vehicles with OEM tuning and all emission equipment present

Manufacturer's Part Number: CB-1869P

SAC Nozzles at 150 percent over with injector body modifications for added fuel delivery

This is typically indicated by nearly full parti line to parting line shaft contact with bearings having less eccentricity

these are ready to drop right in and get back to building that motor

Duramax 01-04 LB7 Injector Set: Remanufactured injector set

ported anti surge racing cover and a upgraded billet compressor wheel with extended tips

Not recommended for frequent or heavy towing with a stock turbo charger

2017-2021 Duramax L5P Gator Fasteners Heavy Duty Head Stud Kit (HSK66L5P)

Dodge 03-04 Injector Set: Remanufactured injector Set at 45 percent over

HP Tuners MPVI3 (Required for tuning)