Builder's Exhaust Pipe Kit



This kit makes it possible to fabricate from scratch a complete set of straight pipes for your custom Big-Twin powered chopper. NOTE: not available for sale in California—see Fitment.

Technical Details

  • Cold-rolled 1-3/4-inch O.D. high-tensile steel tubes with 16-gauge walls
  • Five H-D compatible header flanges included: Panhead, Shovelhead, STD, Ironhead and Evo
  • Two large radius (3.5"/89mm) 180-degree bends with straights
  • Two small radius (2.5"/63mm) 180-degree bends with straights
  • Two 45-degree bends with straight tubes and bologna-cut ends
  • Two straight tubes with flattened tube ends for custom exhaust tip designs
  • Two flared trumpet ends

    Install Tips

    This is a DIY product for skilled motorcycle builders and metal fabricators only. Each kit includes enough straight and bent 1-3/4-inch O.D. tubing to fabricate a couple sets of open exhaust pipes for your chopper, depending on the complexity of your custom design. Header flanges for five different H-D cylinder styles are included with each kit: Panhead, Shovelhead, Ironhead, Evo and STD. WARNING: The California Air Resources Board (CARB) prohibits the sale or use of any aftermarket accessory that alters or modifies the performance of original-equipment emission-related components on motorcycles other than on racing vehicles on closed courses, or by Executive Order from CARB authorities. Check your local laws and motorcycle manufacturer's documentation for more information.

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      Free shipping over $100

      Spend over $100 in our online store and your order ships for free within the USA. Orders placed before 2:00PM PST generally go out the same day so you get your stuff fast.


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    5.0 Based on 5 Reviews
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    Filter Reviews:
    David P.
    Customer review

    Great product. More than enough tubing to whip up a set of pipes. Clean starting point. I made CHOLO pipes and still have enough to make some high and tights.

    Diego P.
    Customer review

    Excellent materials they are expertly packaged, including each tubing in its own plastic bag with oil to prevent rust and all the curves and straight tubing to make some sick pipes!

    Alex B.
    Customer review

    All that you need for a diy sick set of pipes. Very satisfied.

    Tom R.
    Customer review

    Got a case of beer, a radical idea, one night, and some welding skills? This is your huckleberry.

    trent r.
    Customer review

    we got these for our xs650 project, the "freedom or death machine." the packaging was great, the pipes were in perfect shape, the quality was as you would expect from biltwell, and there was much more than we needed for us to make a tight 2-into-1.

    definitely recommended.

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