DP-0300 2015.5-2016 6.6L Duramax 4" Dp-back DPF Delete kit

2015.5-2016 DURAMAX 6.6L 4“ Dp-Back DPF Delete Race Pipe

Improve the performance of your motor!

DP-0300.png__PID:20e059c9-0f5d-4b92-8846-806dbafb8d20

How it Installation?

Installation instructions

0276 1.png__PID:d76f5809-7da0-4774-8b17-e9e6819f0984

Step 1 :

Loosen the flange that secures the downpipe and DPF/exhaust pipe assembly. Remove all factory plugs and ventilation holes from the diesel particulate filter, tie them to the truck frame or remove them from the clamp connection.

Step 2 :

Remove the clamp from the downpipe of the turbine. Loosen the bolts on 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. (Note: Keep the inventory clip as it will be used with the new system),

0301 4.jpg__PID:5da599d5-249c-489c-b94b-185835f26355

0300 3.jpg__PID:b0a09421-bb97-46b7-a391-b60124843ef7

Step 3 :

Place the metal hanger on the downpipe #1 into the upper hole of the hanger bracket or rubber insulation board removed in step 5 above.Install the downpipe using the factory produced turbine belt clamp. Clamping fixture Down, so it can hold the pipe in place, but the pipe can still move. Re fix the hanger bracket to the transmission with bolts.

Step 4 :

Install tube #2 and the required extension tube based on the wheelbase length.Install mufflers and clamp hangers on the shaft neck and exhaust pipe，Insert a metal hanger onto the rubber insulator.

0303 12.jpg__PID:b6012484-3ef7-4043-a243-bc2fba391a45

0301 6.jpg__PID:c043a243-bc2f-4a39-9a45-283f0eabf41e

Step 5 :

Starting from pipeline #1, tighten the vortex band clamp and continue tightening until the rear connection is reached, checking the gap during tightening.

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.

0092 6.jpg__PID:69d53a21-0439-4884-b4a8-7ec1a71ab9cd

TruckTok 2015.5-2016 6.6L GM Duramax LML 4

TruckTok 2015.5-2016 6.6L GM Duramax LML 4" Downpipe Back DPF Delete Pipe

$649.00

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 your truck to verify your turbo discharge style before purchasing!

DESCRIPTION

Product Overview

Late-production 2015.5-2016 LML trucks have hit their peak emissions failure window. Soot-choked DPFs, blown DEF heaters, and failed sensors frequently trigger Limp Mode while tanking fuel economy to 13-14 MPG.
Furthermore, towing with these restrictions traps intense backpressure, spiking EGTs past 1,300°F and straining the turbo. At this age, mid-section patch pipes aren't enough, as the stock 10-year-old tailpipes and hangers are often heavily rusted and ready to snap.

Key Features

Rugged T-409 Stainless Steel Build: Manufactured from industrial-grade T-409 SS, perfectly optimized to expand and contract under intense thermal cycling without cracking or warping.
Continuous 4" Mandrel-Bent Tubing: Engineered with smooth, 4" diameter paths featuring zero internal neck-downs or restrictive bungs, providing the ultimate sweet spot for exhaust gas velocity.
Substantial EGT & Heat Reduction: Instantly drops exhaust backpressure, allowing scorching gases to exit the motor rapidly, dropping EGTs significantly under heavy sustained towing loads.
Precision 3-Bolt Flange Receiver: Equipped with a heavy-duty, CNC machine-cut 3-bolt flange welded at the inlet, guaranteeing a direct, leak-free bolt-on connection to your 15.5-16 factory downpipe output.

FAQ

Q: How loud is this full straight-pipe system? Will it drone inside the cab?

A: This Full straight pipe delivers a crisp tone and turbo whistle but causes highway cabin drone. For daily commuting or family towing, we highly recommend adding 4" Muffler. It tames harsh drone and raspy frequencies perfectly while preserving a deep, muscular diesel V8 rumble.

Q: Will this stop my truck's DEF system from throwing codes and failing?

A: Yes. Once you flash a delete tune and install this pipe, the entire DEF/SCR system is deactivated in the software. The DEF fluid injector stops spraying, the failure-prone tank heater stops cycling, and the NOx sensors are turned off. You will say goodbye to DEF-related check engine lights and countdown timers forever.

Q: How much horsepower will the 5" system add over this 4" version?

A: Zero, unless heavily modified. On a stock turbo, both systems make identical horsepower, but the 4" version preserves sharper low-end throttle response. Choose the 5" pipe only if your LML features a built transmission and aftermarket turbo to handle maximum high-RPM airflow.

Q: Can I install this 4" downpipe-back system myself in my garage?

A: Yes. The system is a direct bolt-on replacement that slips perfectly into your truck's factory rubber mounts. It takes about 1 to 2 hours in a driveway using basic hand tools and jack stands. We highly recommend soaking the old factory bolts in penetrating oil a few hours before starting.

View Details