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TruckTok 2011-2015.5 6.6L Duramax LML 4" DPF & CAT Pipe /CCV/EGR Delete Kit
Brand TruckTok

TruckTok 2011-2015.5 6.6L Duramax LML 4" DPF & CAT Pipe /CCV/EGR Delete Kit

SKU ER-0258
$524.26 - $524.26
$524.26
$524.26 - $524.26
$524.26

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in stock, ready to be shipped

Installation Discussion & Community Support

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FITMENT

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

DESCRIPTION

Product Overview

  • The factory emissions system on 6.6L Duramax LML engines can create multiple airflow and contamination concerns. The DPF system adds exhaust restriction and heat management demands, while the EGR system recirculates soot into the intake tract.
  • At the same time, the factory CCV system introduces oil vapor into the intake system, which can combine with soot over time and contribute to carbon buildup, reduced airflow efficiency, and increased maintenance concerns.

Key Features

  • Optimized Fast Turbo Spool: 4" pipe diameter maintains ideal exhaust gas velocity for faster turbocharger spool-up, crisp throttle response, and minimal cab drone.
  • Reduces EGTs & Ends Active Regens: Replaces the heavy, restrictive DPF canister with a smooth 4" race pipe to eliminate primary exhaust backpressure and stop fuel-draining regenerations.
  • Dual-Source Intake Protection: Removes EGR soot and reroutes CCV oil mist away from the engine—stopping carbon sludge buildup and keepin turbo, intercooler, and intake tract dry and claen.
  • Saves Maximum Labor & Shop Costs: Installing all three systems at once avoids duplicate teardown shop labor around the tight rear engine compartment and chassis.

FAQ

Q: Does adding a muffler to the 4" race pipe sacrifice any horsepower or turbo spool speed?

A: No. The straight-through, perforated-core muffler allows exhaust gases to pass without backpressure—delivering the exact same horsepower gains and fast turbo spool as a straight pipe.

Q: Will this kit lower my EGTs when towing heavy loads?

A: Yes, significantly. Replacing the restrictive factory DPF with a 4" mandrel-bent pipe and deleting the EGR lower, keeping your engine cooler and maintaining peak power during heavy towing.

Q: How much horsepower and torque can I gain by installing this complete kit?

A: Power gains depend on the tune and supporting modifications. This kit improves airflow efficiency by reducing exhaust restriction and intake contamination. Combined with proper tuning, it can help unlock significant horsepower, torque, and throttle response improvements on the LML Duramax.

Q: What is the main purpose of choosing a race pipe with an integrated muffler?

A: The muffler eliminates harsh high-frequency exhaust rasp and prevents annoying interior cab drone during highway cruising or heavy towing, while still delivering a deep, aggressive diesel exhaust tone outside the truck.

  • 5 stars: 14 (82%)
  • 4 stars: 3 (18%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
This product has no reviews of its own. The merchant grouped it with related products, so the reviews shown are from across that group.
J
Jesse Colton
2013 Sierra — runs better than new

2013 GMC Sierra 2500 with 140K miles. Was dealing with constant regens and EGR soot buildup. Bought this combo kit and a tune. Whole install took a Saturday afternoon. Truck now pulls harder, runs cooler EGTs, and I'm seeing 3-4 mpg improvement on the highway. Should have done this years ago.

R
Roy Whitaker
LML owners — this fixes the CP4 issue indirectly

The biggest threat to the CP4 pump is soot-contaminated oil from the EGR system. Removing the EGR keeps your oil cleaner which means your CP4 injection pump lives longer. This kit literally pays for itself by helping prevent a $4000 injection pump failure.

N
Nate Colby
Make sure you have a tuner ready

The kit itself is 5-star quality. Just want to emphasize what others have said: you CANNOT drive the truck after installing without flashing the ECM first. It will go into limp mode immediately. Have your tuner (EFI Live, EZ Lynk, HP Tuners) ready before you turn a wrench.

O
Owen Stark
Coolant line plugs worked perfectly

The EGR delete section comes with proper plugs for the coolant lines that fed the EGR cooler. Threaded brass plugs with O-rings — not the rubber caps some kits use. Zero coolant leaks. This attention to detail in the small parts is what separates this kit from cheaper alternatives.

L
Levi Parsons
Good kit but instructions could be clearer

Everything fits great and the quality is there. Took off one star because the instructions are a single sheet with small photos. If you haven't done an EGR delete before, budget extra time for YouTube research. The DPF pipe part is simple. The EGR section takes some patience finding all the coolant lines.

D
Dan Shipley
Saved over $200 buying as a combo

Priced out DPF pipe and EGR delete separately from other brands — would have been over $400. This combo kit was way more affordable and the quality is identical to the name brands. Everything fit without modification on my 2012 Silverado 3500.

R
Reed Callahan
2015 LML with 180K — still running strong

Had this kit installed at 120K miles. Now at 180K and the truck has never run better. Oil analysis shows way less soot contamination since the EGR was removed. UOAs went from 'caution' to 'normal.' If you plan to keep your LML long term, this is maintenance, not just performance.

G
Grant Holloway
EGR plates are thick — no leaks

I was worried about the EGR block-off plates being thin and warping under heat. These are 1/4-inch steel plates with proper gaskets. Torqued to spec and zero exhaust leaks after 6 months. The DPF pipe is 304 stainless with clean welds. Solid kit all around.

E
Edwin molina (United States)

TruckTok 2011-2016 6.6L Duramax LML 4"/5" DP-Back DPF/EGR Delete kit

B
Brett Hanson
Turbo spools noticeably faster

After removing the DPF brick and the EGR restriction, that VVT turbo wakes up. Spool time cut in half. Throttle response is crisp off the line. The engine bay is also way cleaner without the EGR plumbing — there's actually room to work on things now.

P
Perfection Automotive (United States)

TruckTok 2011-2015 6.6L Chevy Duramax Diesel 4inch DPF Delete Pipe Exhaust

J
Jake Bonner (United States)
Great service

Good parts

T
Troy Benson
Complete delete kit — everything you need

If you own an LML Duramax you know the DPF and EGR are the weak links. This kit has both the 4-inch race pipe and the full EGR delete. One box, one install session. Pipe bolted up perfectly to the factory downpipe. EGR plates and block-off kit fit tight. Do yourself a favor and do both at once.

T
Trevor Wilson (United States)

TruckTok 2011-2015 6.6L Chevy GMC Duramax 4" DPF Delete Pipe & EGR Delete Kit

E
Erik Garvin (United States)
Delete pipe install

This could’ve not gone any easier, I purchased this product and once I received it , it only took 3 hours to install and most the time was in removing the dpf tank and all the other junk. I highly recommend this exhaust pipe delete kit.

C
Corey Yergeau (United States)

Fits perfectly

M
Montraig Gipson (United States)
Responsive fast acting.

Pretty nice. Got recommended to you guys.. thanks again can't wait to get mines.