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D&D Billet Cat M8 2-1 Black Exhaust System

Due to lack of availability we are not currently taking orders for D&D systems. Once they have systems produced and inventory available we will again offer these systems for sale on our website
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NOTE: This product has the following shipping restriction(s):
  • This product cannot ship to California.
Was: $1,249.00
Sale: $1,124.00
Save: 10%
Save: $125.00


The D&D Billet Cat 2-1 exhaust system is a stepped header system which offers 1 3/4" at the head, to 1 7/8" to 2 1/8" at the collector and 2 1/2" where the muffler connects to the header and features a 4" muffler body. The Billet Cat is equipped with heat shields, bolt kit, brackets and baffle. The Billet Cat is designed and dyno tested at D&D's facilities to increase low end torque as well as horsepower. The included Vortex wrapped baffle works great on 107" up to 128" built motors. Performance increases are about 8-10% with the proper tune on your motorcycle.

The Billet Cat system also includes both 12mm and 18mm oxygen sensor bungs. At idle, the motorcycle is deep, boomy and full of character. Not only does the pipe look good, it is a wonderfully sounding experience for the rider.

Note: Blueing and discoloration are caused by excessive heat / improper tuning and will not be covered under D&D's warranty.

Notice: D&D Performance exhaust systems are designed for closed course racing applications only. Not for use on pollution controlled vehicles.

Product Series

Application List

Fitment for 633Z-31T

Application List

Fitment for 633Z-31T


  • 650Z-31T
  • 650Z-31T
  • D&D
  • New


Shipping Information

  • Item Requires Shipping
  • 20.0 lbs.
  • W19.0000” x H7.0000” x L47.0000”