DK Custom Products

Phone: 662.252.8828
Text: 662.420.4891

Choosing the Right Size Thunder Torque Inserts


What Size For My Pipes?


Size Key:

W118 = 1 1/8" in Diameter

W158 = 1 5/8" in Diameter

W258 = 2 5/8" in Diameter



Example of Just the Right Size TTI for the opening-


HERE is the product page Thunder Torque Inserts™


"Just wanted to give you a heads up. I received my Thunder Torque Inserts™ (W118)a couple of days ago, put them in and finally was able to ride today. Great product.

 It toned down the idle and low rpms on my Vance and Hines Shortshots. The increase in the mid range is awesome. I was expecting to buy new pipes, but not now. The Shortshots have become a performance pipe with great sound." -John


"I do not usually thank people, but I just got the W118 much better pulling out...Big Improvement...Anyway thanks, another satisfied customer.  Bike is a 2012 FLHTK with Stage IV Harley kit, dresser duals and street cannons.  

It did change the exhaust note as well, a bit crisper is the only way I can explain, that's also a win in my book! -Eric


Thunder Torque Inserts™ Are Patented.


Live Free - Ride Free!