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4''/5'' Downpipe-Back 2001-2007 LBZ LLY LB7 6.6 Duramax DPF Delete Race Pipe | SPELAB

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Selected Variant SKU: SPES08060-ES08019SP
Regular price $569.99
Regular price $649.00 -12% Sale price $569.99
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Description Fitment FAQ Shipping & Returns

For 2001-2007 LB7, LLY, and LBZ Duramax off-road builds, this 4- or 5-inch downpipe-back race exhaust uses 409 stainless tubing to replace the factory exhaust with a freer-flowing system.

Unlock your LBZ LLY LB7 6.6 Duramax's true potential with this high-performance DPF delete pipe. Our precision-engineered solution eliminates restrictive factory filters, dramatically reducing exhaust gas temperatures (EGTs) while improving turbo spool-up and throttle response. The mandrel-bent construction ensures maximum flow efficiency, helping your diesel breathe easier. Perfect for off-road enthusiasts seeking better power delivery and reduced maintenance hassles.

4-Inch/5-Inch Race Exhaust Specifications

Exhaust Material T-409 Stainless Steel, it is magnetic.
Thickness 2mm thick for long-lasting durability and heat resistance.
Inlet Diameter  4.0"/5.0‘’
mandrel-bent construction Maximum flow efficiency, helping your diesel breathe easier

 

Design Highlights

Expect to see a significant increase in fuel mileage. If your DPF is plugged up your probably averaging about 13-14 mpg. More or less depending on the severity of the restriction. After deleting the DPF/CAT expect to get a combined mileage of 18-19 mpg.

  • It removes the need to service the DPF at regular intervals (cleaning, replacement)
  • A DPF delete will remove the possibility of a DPF failure which could cause expensive diesel repairs
  • Due to less exhaust backpressure, the DPF delete increases exhaust flow and therefore increases the performance of your motor!
  • Paired with an ECU remap, the DPF delete is proven to increase power and torque for all vehicles
  • You will get a FREE high-quality exhaust tip for 4''&5'' Dp-back – unlike others who charge extra!

Installation Notes

Install takes about 1hr with basic hand tools done on the ground of your driveway or garage. Quicker if you have automotive style lift. Cutting may be be required to fit shorter wheelbase bed/cab configurations. Clamps, hangers and hardware are included. You may have to re-use some factory hardware.

Tuner Required: Removal of the DPF, CAT, SCR, and/or DOC involves removing and eliminating emission related sensors. A DPF delete capable tuner is required to prevent any check engine light or diagnostic trouble codes from setting.

  • 5 stars: 9 (82%)
  • 4 stars: 2 (18%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
R
Ryan Hoffmann
clamps

Exhaust goes together fairly decent but clamps are pour design!

W
Willam Fowler

Pipes were good quality. Clamps are not. Clamps were not strong enough.

T
Troy Thayne
5' Downpipe-Back 2001-2007 LBZ LLY LB7 6.6 Duramax DPF Delete Race Pipe | SPELAB?

Easy instal and sounds amazing. No issues and perfect fit.

K
Kyle Rizzo
4’ downpipe back exhaust

Shipped super quick ordered on a Sunday it was at my door on Tuesday! Install went smooth got a few of the pipes locations mixed up but once I figured it out it went smooth! 10/10 will buy again!

T
Todd Griffin

4'/5' Downpipe-Back 2001-2007 LBZ LLY LB7 6.6 Duramax DPF Delete Race Pipe | SPELAB

S
Steve Robbins
4 inch downpipe back Duramax LBZ

Perfect fit. Love it

D
David Glines

Very nice kit! Installed the 4” muffler as well, sounds great!

C
Chinda Meas
Fit nicely

Ordered a couple other exhaust system from other companies but had to return them due to incorrect fitment.

J
Jose
Love it

Was easy to mount and figure out . The spelab tip makes it look real nice and shows its not just any ordinary exhaust. Loving how my diesel sounds!

C
Case Goetz
Amazing Exhaust

This exhaust is amazing. Installed really easy. Everything lined up. Nice high quality pipe and sounds amazing!

Thank you for your comment and I look forward to receiving your feedback pictures!

C
Chris S.
Lbs exhaust

Great fit

Thanks for the review!!!Very much looking forward to your feedback pictures.

J
Jeremy

Hey. I was looking at the 5 inch dp-back with muffler. And was wondering does the exhaust pipe come straight out the back or does it come out right behind the back tire?

SPELAB

Thank you for your inquiry. The exhaust pipe extends from directly behind the rear wheel (behind the rear wheel arch on the side of the vehicle). For further information, please contact us at: (service@spelabautoparts.com ).

C
Case

Does the 5" include a pipe to replace the muffler for a muffler delete?

SPELAB

Thank you for your inquiry.Yes, it does. Please feel free to proceed with the payment. For further information, please contact us at: (service@spelabautoparts.com ).

j
john bever

Will this fit a 2006 chevy 2500 hd extended cab long bed? Note: 4'' DP-Back NOT compatible with long bed models.

SPELAB

Thank you for your inquiry. Do you need the 4-inch or 5-inch version? If it’s the 4-inch one, it won’t be suitable. For further information, please contact us at: ( service@spelabautoparts.com).

C
Cam rowles

Does this require a tuner?

SPELAB

Thank you for your inquiry. Yes, it does require a tuner. For further information, please contact us at: (service@spelabautoparts.com ).

C
Case

Will a 5" fit into a stock down pipe?

SPELAB

Thank you for your inquiry. Could you please provide the year, brand, and engine model of your vehicle, or your Vehicle Identification Number (VIN)? This will help us verify your issue more accurately. For further information, please contact us at: (service@spelabautoparts.com ).

L
Ln

I’m looking for a turbo back exhaust for a 2007 sierra classic duramax , short bed extended cab would this work?

SPELAB

Thank you for your inquiry. Could you please provide your Vehicle Identification Number (VIN)? This will help us verify your issue more accurately. For further information, please contact us at: (service@spelabautoparts.com).

G
Gavin

Okay so I could be wrong but is the stock downpipe 3.5 inches and if so does the 4 inch straight pipe have a 3.5 inch inlet to the down pipe?

SPELAB

We cannot confirm if your factory exhaust pipe is 3.5 inches, but our 4-inch straight-through pipe can only match a 4-inch factory exhaust pipe. For further assistance, please contact our customer service email: service@spelabautoparts.com.