Long Thread Thunder Torque Inserts 158 for Increased HP & Torque
In stock
SKU
DK-LT-TTI-158
Views: 0
Manufacturer
DK Custom Products
$29.95
LONG THREAD THUNDER TORQUE INSERTS™
Increases Low & Mid Range Torque
Adjustable Sound Volume & Tone
For Your
Slip-on Mufflers & Full Exhaust Systems
MADE in The USA!
by
DK Custom Products
FEATURES & SPECS:
- High-Temp Powder Coat Finish
- Stainless Steel Studs (5/16" diameter)
- Includes All Hardware
- FITS 2" diameter & larger Slip-ons (other sizes available)
- Increases Low & Mid Range Torque
- Increased Exhaust Gas Velocity
- Increased Inertial Scavenging
- Adjustable Sound Volume & Tone
- Option for only 1 TTI for 2-1 exhaust systems
- E-Z Installation Bolts into the end of the slip-on muffler (using the baffle bolt hole)
- Patented Technology
- Made in The USA!
The LT (Long Thread) Thunder Torque Inserts™ are appropriate for about 3% of the Harley exhausts out there. Click this LINK to see a full Description of the Thunder Torque Inserts™ that are applicable to most exhausts.
The LT TTI's are only for use as outlined in the video below. Please watch and determine which you need for your application.
If, AFTER watching the video, you are still not sure if you need the Standard TTI's or the LT TTI's, please email or call us and we will help out.
662-252-8828
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Top customer reviews
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Installed on 2024 SG w/ Tab zombie exhaust 0 people found this helpfulEasy install with the long thread. Took about 30 min. Removed the exhaust tips to drill out the hole. Great sound with a deeper tone. Did not notice a decrease in volume.
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Install in 2026 SG3 Trike w/Kustom Krome exhaust 0 people found this helpfulNo issues with the Thunder Torque Inserts. Install in 2026 SG3 without taken mufflers off. Only issue was drilling out nut for the install. Trikes sits low. Did not reduce the volume, made a deeper tone. Sounds great.
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Does exactly what it says it does 0 people found this helpfulI was looking to get a deeper tone to my Bassani tail pipe and that’s what I got with the thunder torque. AND I got some back pressure and a little more HP. Great product!!
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TTI 0 people found this helpfulNice quality product easy installation, where in the dead of winter here on the East Coast I haven’t tried them out yet, but I’m looking forward to it
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Great Product 0 people found this helpfulAdded to a Tab exhaust and it rips!
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thunder torque inserts 0 people found this helpfulInstallation was easy and had a noted increase in power and torque
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TTI 0 people found this helpfulThey did exactly what I needed them to do, eliminate the backfiring on deceleration. Very good product getting a second set for another bike I have
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Works as advertised! 0 people found this helpfulI have a Tri Glide Ultra. I put on a Cobra Head Pipe with 4 inch Reinhart Slip with the baffles removed. Pretty loud but not that bad. The bike runs great. I was curious about these so I ordered a pair. After getting them and talking to customer service I had to exchange them the the long bolt one because I was putting them in the end cap of the Reinhart. Got them installed and went for a nice ride in the country through some small Iowa towns. Speed limit through most of these small towns is 35 mph or 30 mph. Before these inserts I usually shifted down to 5th or even 4th gear to obtain the speed limit. I was amazed that I could remain in 6th gear even at 30 mph. Amazing difference in low end grunt! Worth every penny. Only downside was I have about 36 dollars in shipping for a $58 part after having to exchange them out for the longer bolt version. But still a great performance upgrade for not much money!
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The Solution For Super E flat spots 0 people found this helpfulInstalled S&S T111 with DTT ignition and Super E Carburetor. After adding a Yost Power Tube and perfectly jetting the Carburetor, tuning the ignition module per S&S specifications, the bike just had an extremely flat spot around 2500 RPM. INSTALLED THE THUNDER TORQUE INSERTS and voila, she screans like a banshee. Hind sight is always 20/20. Moving forward, Thunder Torque Inserts will be the first exhaust tune I add.
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