DK Custom Products Thunder Torque Inserts - Insert Fits 3" Diameter & Larger Si…

DK Custom Products Thunder Torque Inserts are patented tuning devices that bolt into slip-on muffler baffle openings to increase low and mid-range torque and alter exhaust tone on V-twin motorcycles. Made in the USA with stainless steel studs and high-temp powder coat finish, they dial in performance and sound without removing the muffler.

Features

• Patented torque-tuning technology
• Increases low and mid-range torque output
• Stainless steel 5/16" diameter studs
• High-temp powder coat finish
• Adjustable sound volume and tone
• E-Z installation into muffler baffle bolt hole
• All hardware included
• Increases exhaust gas velocity and inertial scavenging

Specifications

• Brand: DK Custom Products
• Manufacturer Part #: DK-TTI-258S
• Length: 8 in
• Width: 5 in
• Height: 1 in
• Weight: 0.375 lbs
• Country of Origin: USA

Fitment

Fits V-twin motorcycles with 3-inch diameter or larger slip-on mufflers that have a removable baffle bolt.

Frequently Asked Questions

How do these increase torque?

Thunder Torque Inserts redirect exhaust flow to boost gas velocity and inertial scavenging in the cylinder, adding low and mid-range power without engine modifications.

Do I need to remove my muffler to install them?

No — they bolt directly into the existing baffle bolt hole on the slip-on muffler. Installation takes minutes.

Can I adjust the sound?

Yes — the insert design allows you to dial in different sound volumes and tones by repositioning or swapping inserts.

Will this void my muffler warranty?

Check your muffler manufacturer's warranty terms. The insert is non-destructive and removable, but some warranties may have restrictions.

What size mufflers do these fit?

These inserts fit slip-on mufflers with 3-inch diameter or larger openings and a standard baffle bolt hole.