UDBR-84-D-1017 Rock Exhaust

  • SSDRock_black_colt_3
  • SSDRock_black_colt_2
  • 2012_DynaFatBobc_BLACK_ROCK-copy
  • SSDRock_black_colt_3
  • SSDRock_black_colt_2
  • 2012_DynaFatBobc_BLACK_ROCK-copy


By Kern ROCK Exhaust, Painted black stainless steel for Harley-Davidson Dyna models with modern exhaust layout. (Fat bob) read more
Harley Davidson Family:

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Available on back-order

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By Kern ROCK Exhaust, Painted black stainless steel for Harley-Davidson Dyna models with modern exhaust layout. (Fat bob)

The By Kern ROCK Exhaust is your best choice if you want a good-sound bike.

We have made you an exhaust that guarantees the best sound and the best performance too. You’ll find the Rock feeling with this exhaust what you expect from your Harley-Davidson.

You have chosen a Harley-Davidson Dyna models with modern exhaust layout. (Fat bob) in Painted black stainless steel

You can replace the original Harley exhaust with the By Kern Rock Exhaust. There is no need to make any changes to the factory structure, so if you feel good enough and take responsibility, you can install it by yourself. This exhaust provides an excellent sound for your bike, but its legal use may vary by countries. Maximum noise level of the exhaust reaches 115 dBA. Before you buy, find out if it is road legal in your country. You can buy a dB killer separately for the exhaust, which can be fastened with screws, but it only reduces the volume a little. The exhausts are made of stainless material with mirror polished finish. There is no surface coating been used.

Package contents:

  1. 2 pieces (1 pair) of stainless steel mirror polished muffler.
  2. 1 piece M10 x 20 screws, nut, and washers, 1 piece 5/16  screws, nut, and washers, 3 cable ties
  3. GIFT 2 Colt Exhaust Ends Installed.
  4. Installation instructions.

What the package does not contain, but is required:

  1. Tools for installation.
  2. Exhaust clamps to be used by the manufacturers.
  3. Use the factory fixing bolts for upper muffler.
  4. Exhaust gasket for models after 2017 cannot be removed from the factory exhaust and can be ordered separately.


We provide a 2-year manufacturer’s warranty for mechanical parts of the exhaust system. Damage resulting from improper use or incorrect installation is not covered by the warranty. All of our exhausts are made of stainless material, they may become discolored, but if the engine is tuned properly, this will not happen. The discoloration can be removed by polishing. (polished glossy types only) We have 1 year warranty on the coating for painted exhausts. In the case of a fault, the exhaust must be sent back to our workshop  in Hungary where we examine the problem and make the necessary repairs.

In case of legal complaints, we will refund the shipping cost (max. 20 Euro).

We can accept returns for delivered product only in unopened packaging for 14 days from the date of purchase.

Additional information

Harley Davidson Family

Motor type

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Manufacture Year

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