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USD 375.96
Part #: MAG18982

Magnaflow 5" Downpipe-Back Aluminized Custom Builder Pipe Kit 18982

2001-2004 GM 6.6L Duramax (All Crew & Ext. Cabs)
Part #: MAG18982
★★★★★ ★★★★★ 4 Reviews
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The Magnaflow 5" Downpipe-Back Aluminized Custom Builder Pipe Kit 18982 offers the most options when building an exhaust for your 2001-2004 GM 6.6L Duramax. For the racer, it provides a mandrel bent pipe-only exhaust from downpipe to tail pipe complete with all hardware. For the street driver, the CBPK is the basis for a custom exhaust that allows you to purchase and install the converter, muffler and tip of your choice. The Aluminized Custom Builder Pipe Kit Series has a limited 1 year warranty. 

Features & Specifications:
  • Material: 5" Aluminized Steel 
  • Mandrel Bent Construction 
  • System Type: Downpipe-Back  
  • Tip Quantity: No Tip Included 
  • Exit Position: Single Passenger Side Exit 
  • 1-Year Warranty 
Fitment Note: 
All Crew & Extended Cabs applies to GM 2500HD/3500HD Pickups. 
This system is not designed for use on Cab & Chassis models.


  • MFG. Number 18982
  • Manufacturer Name MagnaFlow
  • Shipping Weight 75.00 lb.
  • Shipping Length 59 in.
  • Shipping Width 14 in.
  • Shipping Height 19 in.
  • Fuel Type Diesel
  • Diameter 5"
  • Exhaust Exit Single
  • Exhaust Type Downpipe-Back
  • Material Aluminized Steel
  • UPC 841380087225
  • Warranty Yes
  • Warranty Info 1 Year Limited
  • Prop 65 WARNING: Cancer & Reproductive Harm -


★★★★★ ★★★★★
5.0/5 Stars out of 4 Reviews
5 inch straight pipe
([email protected]) | February 14th, 2018
I just installed my new 5 inch exhaust last week. I was very pleased with the quality and figment of the product. Before I had 4" with a muffler. This is definitely much louder! You also get more of that turbo whistle. But not too much at an idle. Beware when you get on it, you'll be heard from blocks away! Personally I might get a 5inch muffler to install in the near future.
Best fitting Kit
(North Carolina) | February 2nd, 2015
I've sold and installed 100's of kits and this one takes the cake! They always fit perfect, Packed well, THE ONLY KIT ON THE MARKET WITH A 5" FRONT PIPE ITS A FULL 5" FROM THE DOWN PIPE OULET TO THE EXIT. Easy to remove once installed if you need to because it doesn't crimp in place. 5 Stars Great Kit for Duramax's and to top it off its a 90 degree exit unlike all the other brands that exit at 45 degrees.
Best bang for your buck and perfect fitment
(Delaware) | March 8th, 2016
This exhaust is the best bang for your buck. Why spend more if they all do the same thing.. theyre all straight pipes. The fitment was great and install was a 7/10 difficulty only because i did it in the driveway.
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Emissions Notice

This product is not legal for sale or street use in California. Certain aftermarket products are subject to governmental emission standards regulated by the California Air Resources Board. In order for these products to be legal on a specific vehicle in California, the part number must receive a CARB Executive Order (EO) number. This number makes the part legal for use only on specific years, makes and models of vehicles. A decal with CARB EO number for these parts must be displayed in the engine bay to satisfy smog inspection requirements.