DK Custom Products Thunder Torque Inserts for 3" Diameter & Larger Slip-Ons - Single
About DK Custom Products
DK Custom Products parts and accessories are stocked at Vtwinbikers for Harley-Davidson and Indian Motorcycle applications. Every DK Custom Products item we list is new and sourced through authorized distribution. If you are not certain a part matches your year and model, use Shop by Bike or email our team before you order and we will confirm fitment first.
DK Custom Products Thunder Torque Inserts are patented tuning devices designed to bolt into slip-on muffler baffle openings. These inserts increase low and mid-range torque and allow you to alter the exhaust tone on your V-twin motorcycle.
Why riders pick this
- Patented torque-tuning technology
- Increases low and mid-range torque
- Stainless steel 5/16" studs
- High-temp powder coat finish
- Adjustable sound volume and tone
Optimize your V-twin's powerband and personalize its sound with a single DK Custom Products Thunder Torque Insert. Engineered for slip-on mufflers with a 3-inch diameter or larger, this American-made insert uses patented technology to redirect exhaust flow. The result is a significant boost in exhaust gas velocity and inertial scavenging, directly translating to enhanced low- and mid-range torque output, giving you more grunt where it counts.
Precision Engineered for Performance
- Patented torque-tuning technology for real-world gains
- Increases low and mid-range torque output
- Durable stainless steel 5/16" diameter studs
- High-temp powder coat finish for longevity
- Adjustable sound volume and tone for a personalized exhaust note
Effortless Installation and Tuning
Installing the Thunder Torque Insert is designed to be straightforward and convenient. It bolts easily into your muffler's baffle bolt hole, allowing you to dial in performance and sound without the need to remove the entire muffler. All necessary hardware is included, ensuring a quick and effective upgrade for your Harley-Davidson or Indian Motorcycle, letting you get back to riding with improved power and a customized sound.
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
Common questions
How do these inserts increase torque?
Thunder Torque Inserts redirect exhaust flow to boost gas velocity and inertial scavenging in the cylinder, which adds low and mid-range torque to your V-twin engine.
Is special equipment needed to install these?
No, these inserts are designed for easy installation into the muffler baffle bolt hole using basic tools. All necessary hardware is included.
Will this fit my specific V-twin motorcycle?
This insert is designed for V-twin motorcycles with 3-inch diameter or larger slip-on mufflers that have a removable baffle bolt. Please confirm your muffler's specifications.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | DK Custom Products |
| TYPE | Hardware/Fasteners/Fittings |
| SKU | 880-3047 |
| WEIGHT | 0.37 lb |
