DP-0276 2015.5-2016 6.6L Duramax DPF & CAT Delete Pipe

2015.5-2016 DURAMAX 6.6L 4“ DPF & CAT Delete Pipe

Improve the performance of your motor!

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How it Installation?

Installation instructions

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Step 1 :

Remove the strap clamp from the downpipe of the turbine. Loosen the bolts at the fixture to a sufficient degree, and then use a flat head screwdriver to pry the fixture out of the flange at three positions. remove the clamp.

Step 2 :

Place the metal hanger on the #1 downpipe into the upper hole of the hanger bracket or rubber insulation board, and install the downpipe using the factory turbine belt clamp. Loose clamping fixtures not only fix the pipeline in place but also allow it to move. Re fix the hanger to the transmission with bolts.

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Step 3 :

Install pipe #2 Connect one end of the sloping surface to the tail end of the # 1 downpipe and tighten it loosely with a fixture. Place the hanger together into the OEM rubber hanger.

Step 4 :

Connect the muffler replacement pipe #3 to the first section of the factory shaft pipe, and if necessary, cut it to a suitable length to fit the pipe.

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Step 5 :

Next, install the #2 pipeline to the end of the #3 and OEM tailpipe.
Starting from pipe #1, tighten the scroll belt clamp and continue tightening until the rear connection, while tightening the clamp. Check the gap.

Step 6 :

1.Install the bracket. The M10 bolt will be screwed into the support bolt. Secure the transmission dipstick to the bracket using 1/4-20 bolts, nuts, and washers.
2.The bracket will hold the coolant hose connector in place.

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TruckTok 2015.5-2016 Chevy/GMC Duramax LML 4

TruckTok 2015.5-2016 Chevy/GMC Duramax LML 4" DPF & CAT Delete Pipe

$235.90

FITMENT

2015.5-2016 6.6L Silverado & Sierra Duramax 2500HD/3500HD LML engine models with the 3-bolt flange.
Does NOT Fit 2011-2015.5 model with the V-Band Clamp style.
Please physically inspect underneath truck to verify your turbo discharge style before purchasing!

DESCRIPTION

Product Overview

Late-model 15.5-16 Duramax LML trucks pack incredible factory performance, but the heavy, triple-layer emissions network (DPF + DOC + SCR/DEF) wrapped under the chassis acts like a breathing stranglehold.
Over time, permanent ash accumulation completely chokes the filter ceramic bricks, triggering relentless and fuel-heavy Active Regeneration cycles.
This chokes your fuel economy to a painful 13-14 MPG, spikes your towing EGTs past 1,300°F, and puts high structural stress on your turbo charger, frequently causing Limp Mode.

Key Features

Mandrel-Bent Flow: CNC mandrel-bent 4" T-409 SS tubing ensures smooth, high-velocity exhaust flow. Completely unrestricted with No Bungs to interrupt the air path.
Massive Mileage Recovery: Stops fuel-heavy active regeneration cycles permanently. No more wasting expensive diesel fuel just to forcefully bake an empty factory ceramic filter.
Absolute Backpressure Relief: Swapping out the choked factory DPF/CAT/SCR sections drops backpressure to zero, letting hot exhaust gases escape instantly to lower critical EGTs.
Precision-Engineered 3-Bolt Flange: Crafted with a heavy-duty, CNC machine-cut 3-bolt flange that guarantees a seamless, direct leak-free connection to 15.5-16 turbo downpipe outlet.

FAQ

Q: What is the difference between pipe "With Muffler" vs "No Muffler"?

A: This pipe replaces only the DPF and CAT sections to connect to your factory muffler. The Pipe replaces both sections and adds a high-flow muffler. If your stock muffler is old or rusting after nearly a decade, the all-in-one kit is the perfect replacement.

Q: Can I pair this 15.5-16 3-Bolt Flange delete pipe with the 11-15.5 Downpipe？

A: No, absolutely not. This downpipe features a V-band clamp outlet for early-generation setups, while the 15.5-16 late-model delete pipe requires a triangular 3-bolt flange downpipe connection. They will not bolt together.

Q: How much mileage recovery can I expect?

A: Most owners see a massive jump. While a clogged DPF drops fuel economy to 13–14 MPG due to frequent regeneration cycles, deleting it restores combined mileage to 18–19 MPG under normal driving conditions (oversized tires or heavy towing will lower this).

Q: What is the main structural difference between these two exhaust systems?

A: The 4" Race pipe is a mid-section pipe replacing only the factory filters under the cab while reusing your stock tailpipe for quiet comfort. The 5" DP-Back is a full straight pipe that replaces entire exhaust from the turbo to the rear bumper for maximum flow and raw V8 volume.

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