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Product Details

Magnaflow Exhaust Systems

Custom Builder Series Diesel Exhaust System by MagnaFlow®. Whether you're a professional custom truck builder or building your own dream in your home garage, the Custom Builder Kit is the perfect choice for your one-off exhaust system. With the Magnaflow kit you can easily build a custom system with professional finish and lifetime warranty at very reasonable cost.

MagnaFlow - VideoMagnaFlow - Image GalleryMagnaFlow - Warranty


  • Moderate - Aggressive Sound
  • Kit Includes All Tubing Clamps and Hangers For Custom Exhaust System
  • 100% Stainless Steel
  • Mandrel Bent Tubes For Free Gas Flow
  • Kit Backed By Magnaflow’s Lifetime Warranty

When “off the shelf” won't cut it, The MagnaFlow Custom Builder Kit is there to help you create an exhaust system that fits your needs. The kit includes all of the basic building blocks needed for your system, including the necessary hangers and flanges, as well as straight and mandrel-bent pipes. You can piece together your custom exhaust without welding and custom bending of pipes. Cutting might be necessary, depending on the model of your truck. There is no reason to build a custom exhaust system from scratch. The MagnaFlow kit lets you build a fully customized system with a professional finish to a very reasonable cost. And unlike other custom exhaust systems, they are backed MagnaFlow's Lifetime Warranty.

MagnaFlow® has been in business for more than 30 years, with its slogan “Quality – Power – Sound” leading the company on its steady path to success. MagnaFlow is the market leader in exhaust systems. No other brand has managed to fulfill the demands auto enthusiasts have on their exhaust systems, while still complying with emission standards, as MagnaFlow has. The product line is steadily expanding, introducing new, cutting edge technologies and designs. MagnaFlow is the leader in exhaust system design and the company is determined to stay in the lead.

Warranty Information

The manufacturer warrants that all Magnaflow Performance Products are free from defects. Most of our exhaust products are warranted against blowouts and defects in material and workmanship for as long as the original purchaser owns the vehicle on which it was originally installed. The warranty is void if the exhaust products are not installed properly on the vehicle for which it is designed.

This warranty does not apply to any exhaust product which has been installed on any commercial or racing vehicle or which has been improperly installed, altered, or subjected to misuse or damage from accidents. Also, cost of labor and any additional parts required to complete installation of a replacement product are not covered by this warranty.

The warranty certificate, along with proof of purchase, MUST be presented to the service outlet from which you originally purchased the exhaust product, or any participating dealer, when making a claim for replacement. The original exhaust product must also be returned and exchanged for a new exhaust product of the same part number.

No other warranty, expressed or implied (including merchantability), applies to the exhaust product, nor is any person or the manufacturer authorized to assume any other warranty. The manufacturer does not assume any responsibility for any consequential damages occurred by the exhaust product, or inconvenience or interruption in any operation.

This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

  • Ceramic Coating: 1 Year Warranty
  • Finish: Black - 1 Year Warranty
  • Construction: Aluminized - 1 Year Warranty
  • Construction: Stainless - Lifetime Warranty
  • Mufflers: Lifetime Warranty
  • Cat-Backs: Lifetime Warranty
  • Federal EPA Converters Warranty:
  • Internal (Converter substrate): 2 Years, 25,000 Miles
  • External (Converter housing assembly) :5 Years, 50,000 Miles
  • California CARB Approved Converters Warranty:
  • Internal and External: 5 Years, 50,000 Miles
  • Federal EPA Converters Sold in New York:
  • Internal (converter substrate): 2 Years, 25,000 Miles
  • External (converter housing assembly): 5 Years, 50,000 Miles
  • California CARB Approved Converters Sold in New York:
  • Internal & External: 5 Years, 50,000 Miles
Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Product Reviews


Every Customer can leave a review about our service and the product that was purchased. In order to leave your review for your new product, please follow the link in the email you receive after completing your purchase. You can rate appearance, ease of installation, price/value and product quality.

MagnaFlow® - Custom Builder Series Stainless Steel Turbo-Back Diesel Exhaust System
MagnaFlow® - Custom Builder Series Diesel Exhaust System
Average Rating: 5 of 5
5 of 5
This is the cleanest and easiest kit to install and modify if need be! If you're pushing some serious horsepower, look no further than the 5" builder series from CARiD.com made by Magnaflow!
CPosted by (Reno, NV) /
2006 Chevy Silverado
Was this review helpful for you? Yes
5 of 5
Product looks sweet and it was very easy to install, it turns heads everywhere I go! Definitely worth the money, order yours today!
DPosted by (Grandview, TX) /
2005 Chevy Silverado
Was this review helpful for you? Yes
5 of 5
Sounds nice!
It makes my vehicle sound just the way I like it. Take it or leave it but I got the one I need without any advices. I don’t need any help to choose the best product. Ordered on Monday, got on Friday like clockwork.
APosted by (Clarksville, TN) /
2005 GMC Sierra
Was this review helpful for you? Yes
5 of 5
Great Product
This product fit great, looks good. I had it installed at a muffler shop so it could be welded to keep it in place. Should have got a muffler with it.
APosted by (Apopka, FL) /
2007 Dodge Ram
Was this review helpful for you? Yes
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