DK Custom Products Thunder Torque Inserts - Insert Fits 1" Diameter & Larger SET

DK Custom Products Thunder Torque inserts are bolt-in exhaust modifications for V-twin motorcycle slip-on mufflers that alter gas flow to increase low and mid-range torque. Stainless steel construction with patented technology lets riders adjust exhaust tone and volume by swapping inserts — all hardware included for direct installation into the baffle bolt hole.

Features

• Stainless steel 5/16" diameter studs
• High-temp powder coat finish
• Increases low and mid-range torque
• Increases exhaust gas velocity and inertial scavenging
• Adjustable sound volume and tone
• Bolts directly into slip-on muffler baffle hole
• Made in the USA

Specifications

• Brand: DK Custom Products
• Manufacturer Part #: DK-TTI-118W
• Length: 8 in
• Width: 5 in
• Height: 1 in
• Weight: 0.25 lbs

Fitment

Fits V-twin motorcycles with slip-on mufflers that have a baffle bolt hole to accommodate 1 inch diameter or larger inserts.

Frequently Asked Questions

How do I install the Thunder Torque insert?

Bolts directly into your slip-on muffler's baffle bolt hole using the included hardware — no modifications needed.

Can I change the sound by swapping inserts?

Yes — the patented technology allows you to adjust exhaust tone and volume by switching different insert designs.

Will this work on my Harley or Indian slip-ons?

These fit V-twin slip-ons with a baffle bolt hole and 1 inch diameter or larger opening. Verify your muffler specs before ordering.

What performance gains should I expect?

Designed to increase low and mid-range torque through enhanced exhaust gas velocity and improved inertial scavenging.