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Slip-Over Extension Pipes w/ Mufflers, AHC, 3-1/2 x 26 Inch
Slip-Over Extension Pipes w/ Mufflers, AHC, 3-1/2 x 26 Inch

Slip-Over Extension Pipes w/ Mufflers, AHC, 3-1/2 x 26 Inch

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Slip-Over Extension Pipes w/ Mufflers, AHC, 3-1/2 x 26 Inch
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Slip-Over Extension Pipes w/ Mufflers, AHC, 3-1/2 x 26 Inch
Slip-Over Extension Pipes w/ Mufflers, AHC, 3-1/2 x 26 Inch
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Part # 91013376H
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Expanded length is 3.75"
Material Type:
Ceramic Coated
Overall Length:
Tube O.D.:


These extensions are designed for use with "T" roadster headers. Professionally cut and mandrel bent extensions slip over 3-1/2" diameter collector pipes. Features a 12-1/2" perforated glasspack muffler. Mufflers are included but are not installed. Glass packs can only be installed one way. Simply slide the muffler inside of the extensions for installation. Muffler has a 1.900" I.D. Features a ceramic coating for superior protection.

Item Details

AHC Coated on the outside only


Armor Hot Coating (AHC) is a heat resistant, ceramic coating applied to the outside of the header. This coating will reflect heat, which helps retain more heat within the header tube while simultaneously speeding up the exhaust flow. Not only will this coating help you make more horsepower, it also keeps your headers rust-free, looking great, and lasting longer (when properly maintained).  If you are looking for a show-quality finish for your headers, this is it! Our AHC will withstand exhaust temperatures of up to 1300° F. 

AHC coated headers will burn and be damaged at exhaust temperatures above 1300 degrees. An excessively lean fuel mixture can generate exhaust temperatures over 1700-1900 degrees. If the coating is burned (which will look like a dull gray) due to a lean condition, it is not warrantied, but the headers can be recoated.

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What's In The Kit

Each kit from Speedway Motors is carefully packaged and delivered right to your door. Below is a list of all the items you should expect to receive when you order this kit. Some of these items may also be available for sale individually if you're here looking for replacement parts.
  • Slip-Over Kickout Extension Pipes, AHC, 3-1/2 x 26 Inch
    Qty x 1
  • Speedway Muffler Inserts for 26 Inch Header Collector Extensions
    Qty x 1

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    The Toolbox is Speedway Motors' hub for professionally written articles.

  • by Jeff K.
    Product guru Jeff K. doesn't just limit his revival tendencies to those of the four wheeled variety. He also likes to leave his mark on motorcycles, giving new life to tired old two-wheelers. Follow along as he tackles a 2004 Kawasaki Vulcan.
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  • Some basic info on the various exhaust options carried by Speedway Motors.
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