• 4-downpipe-back-dpf-delete-kit-for-2015-5-2016-chevy-gmc-lml-6-6-duramax-4500
  • 4-downpipe-back-dpf-delete-kit-for-2015-5-2016-chevy-gmc-lml-6-6-duramax-4500
  • 4-downpipe-back-dpf-delete-kit-for-2015-5-2016-chevy-gmc-lml-6-6-duramax-4500
  • 4-downpipe-back-dpf-delete-kit-for-2015-5-2016-chevy-gmc-lml-6-6-duramax-4500
  • 4-downpipe-back-dpf-delete-kit-for-2015-5-2016-chevy-gmc-lml-6-6-duramax-4500
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4" Downpipe-Back DPF Delete Kit for 2015.5-2016 Chevy GMC LML 6.6 Duramax

4" Downpipe-Back DPF Delete Kit for 2015.5-2016 Chevy GMC LML 6.6 Duramax

$439.00
$439.00 $439.00
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🎁PRE-Black Friday sitewide 20%off with code: DP12

🎁$100 off orders over $200 code: BF100

Size

Description

Enhance your 2015.5–2016 Duramax 6.6L performance with this off-road/racing-only DPF-delete straight exhaust system. Designed for maximum flow and minimal backpressure, it boosts horsepower, torque, and exhaust gas temperature (ECT) reduction—ideal for towing, racing, and heavy-duty off-road use. Made from durable T409 stainless steel, it’s a must-have for serious performance builds.

Key Features

  • Full Straight-Pipe Design: Improves exhaust flow, reduces backpressure, and significantly lowers ECTs for increased engine power and efficiency.
  • Off-Road/Racing Use Only: Removes DPF and catalytic converters—not compliant with EPA/CARB emissions standards.
  • T409 Stainless Steel Construction: Offers high heat and corrosion resistance with a balance of durability and cost-effectiveness.
  • Easy Bolt-On Installation: Uses factory-style hanger locations for a secure fit without chassis modifications.
  • Performance-Optimized: Best paired with ECU tuning, larger turbos, and upgraded injectors—supports 500+ HP Duramax builds.
  • Reduced Maintenance: Eliminates DPF-related servicing and prevents clogging or failure issues.
  • Lightweight & Open Flow: No muffler or resonator for maximum sound and minimal restriction—perfect for race and off-road environments.

⚠️ Note: For off-road/competition use only. Not compatible with emissions sensors or Cab & Chassis models. Does not include a tip. Tuning required for optimal performance.

Fitment

  • 2015.5 - 2016 Chevrolet Silverado & GMC Sierra 2500/3500 HD 6.6L Duramax LML pickup trucks.

  • Note: *3-Bolt Flange Style. *Will not fit Cab & Chassis trucks

Fast Shipping Policy

Your order will be dispatched within 1-2 business days, and the package will arrive within your order's estimated date. 

Easy Return Policy

Every order comes with a 14-day free return, which means you don't have to pay for a return slip. 

  • One-Year Warranty
  • 14-Day Return
  • 4-12 Days To Arrive
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Didn’t find what you were looking for? Reach out below!

Frequently Asked Questions

What is a delete tuner?

A delete tuner is a device that reprograms yourtruck's ECM (computer) to turn off emissionssystems like the DPF, EGR, and DEF, allowing yourtruck to run without those components

Can l use a delete tuner withoutphysically removing TheDPF/DEF/EGR parts?

You MUST remove your DPF(Diesel ParticulateFilter), as the filter will clog and stop all exhaust flowwhen shut off. You will no longer need DEF(DieselExhaust Fluid), and you may remove your DEF tankif you wish, or it can sit empty. The EGR may remainas is, but we recommend removing the physicalparts as well.

Is a Delete Tune bad for mytruck's engine?

Quite the opposite. In fact, many customers reportimproved engine life, smoother shifting, and betterfuel economy (typically 3-5 MPG gains) when usinga quality delete tuner.

What's the difference between adelete tuner and a delete tune?

The tuner is the hardware device. The tune is thesoftware file that gets uploaded to your truck's ECM.Your delete tuner includes a delete tune when youpurchase from us.

Do delete tuners void my warranty?

Yes. Any emissions-related modification, includingtuning, can void the manufacturer's warranty. Manycustomers wait until after their warranty expiresbefore deleting.

Do l need a mechanic to install thetuner? How long does installationtake?

Not necessarily. Many of our customers install their delete tuner themselves in under 30 minutes. We include easy-to-follow instructions, and our support team is available if you need help.

Will my truck pass inspection oremissions testing with a deletetuner?

No. Delete tuners disable emissions systems, so your truck will not pass emissions tests in areas where they're required. Some states have exemptions (e.g. heavy-duty or rural-use trucks).

Can l go back to stock afterinstalling a delete tuner?

Yes. However, in most cases you will have to have the ECM flashed at the dealership. If this is a concern, contact our team and we can explain further.

Is the delete tune VlN-locked?

Yes. All delete tunes are VIN specific and will only work on one truck. The tuner (hardware device), may be used on multiple vehicles for diagnostic or monitoring purposes where applicable.

What support do l get with my tuner?

We offer lifetime customer support, step-by-step install guides, and remote help from our tuning team. You're never left hanging, even after the sale.