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

DK Custom Products Thunder Torque inserts are baffles designed to fit inside 3-inch-diameter or larger slip-on mufflers, tuning exhaust flow for increased low and mid-range torque and adjustable sound. Stainless steel construction with a high-temp powder coat finish, made in the USA.

Features

• Fits 3" diameter mufflers and larger
• Stainless steel studs (5/16" diameter)
• High-temp powder coat finish
• Increases low and mid-range torque
• Increased exhaust gas velocity and inertial scavenging
• Adjustable sound volume and tone
• Bolts into baffle hole — no muffler modification needed
• All hardware included

Specifications

• Brand: DK Custom Products
• Manufacturer Part #: DK-TTI-258W
• Length: 8 in
• Width: 5 in
• Height: 1 in
• Weight: 0.6 lbs
• Country of Origin: USA

Fitment

Fits V-twin motorcycles with 3-inch-diameter slip-on mufflers or larger.

Frequently Asked Questions

How do I install this insert?

Bolt it into the existing baffle bolt hole at the end of your slip-on muffler — no drilling or permanent modification required.

Will this work with any slip-on muffler?

It fits slip-on mufflers with 3-inch inside diameter or larger. Verify your muffler diameter before ordering.

Can I adjust the sound with this insert?

Yes — the patented design allows you to adjust both sound volume and tone by repositioning the insert inside the muffler.

What bikes does this fit?

Any V-twin motorcycle with a compatible slip-on muffler 3 inches or larger in diameter, including Harley-Davidson and Indian models.

Does it improve performance?

It increases low and mid-range torque through optimized exhaust gas velocity and inertial scavenging.