DK Custom Products Thunder Torque Inserts for 2" 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 tuned exhaust restrictors that bolt into slip-on mufflers. These inserts are designed to increase low and mid-range torque while allowing you to adjust your engine's sound profile.
Why riders pick this
- Increases low and mid-range torque
- Adjustable sound volume and tone
- Stainless steel 5/16" studs
- High-temp powder coat finish
- E-Z bolt-on installation with hardware
Give your Harley-Davidson or Indian Motorcycle a significant boost in usable power with the DK Custom Products Thunder Torque Insert. Specifically engineered for slip-on mufflers with a 2-inch diameter or larger, this single insert works by optimizing exhaust gas velocity. This leads to improved inertial scavenging, which translates directly into increased low- and mid-range torque, making your V-twin feel more responsive and powerful through the gears.
Optimized for Power and Sound
- Increases low and mid-range torque for improved acceleration
- Enhanced exhaust gas velocity and inertial scavenging
- Adjustable sound volume and tone to customize your exhaust note
- Durable stainless steel 5/16" studs
- High-temp powder coat finish for long-lasting protection
Effortless Performance Upgrade
The Thunder Torque Insert offers an E-Z installation process, bolting directly into the existing baffle bolt hole of your slip-on muffler. There's no need for welding or complex modifications, making this a straightforward and effective performance upgrade. All necessary hardware is included, ensuring you have everything you need to get more out of your V-twin's exhaust system.
Specifications
- Brand: DK Custom Products
- Manufacturer Part #: DK-TTI-158S
- Length: 8 in
- Width: 5 in
- Height: 1 in
- Weight: 0.3 lbs
Common questions
How do I install these inserts?
They bolt directly into the end of your slip-on muffler using the existing baffle bolt hole. No modifications or additional holes are required for installation.
Will these work with my aftermarket slip-on mufflers?
These inserts are compatible with V-twin motorcycles that have 2-inch diameter slip-on mufflers and an existing baffle bolt hole. Please check your specific muffler design.
Do I need to tune my bike after installing a single insert?
While a single insert can improve performance, a full re-tune isn't always strictly necessary. However, for maximum gains and optimal engine health, especially with other modifications, a dyno tune is recommended.
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 | 880-3045 |
| WEIGHT | 0.3 lb |
