
FLEECE PERFORMANCE
CHOOSE YOUR RIDE
At Tameless Performance, we focus on modifying the performance of your diesel truck and providing quality parts for Dodge Cummins, Ford Powerstroke, and GM Duramax engines. If you want to enhance the horsepower, torque, or fuel efficiency of your truck, our specialists will provide you with the necessary parts.
SETTING NEW STANDARDS
What makes us stand out in this roaring sea of diesel upgrades? It's simple – our commitment to excellence, top-tier quality, and an unrivaled dedication to your satisfaction. See what you can expect when you roll into our world...
PRODUCT SPOTLIGHT
-
Tameless Performance 2006 to present 5.9 6.7 Cummins Valve Cover Black
Regular price $689.00 USDSale price $689.00 USD Regular priceUnit price / per -
Tameless Performance 2006 to present 5.9 6.7 Cummins Valve Cover Raw
Regular price $589.00 USDSale price $589.00 USD Regular priceUnit price / per -
Hot Shot's Secret Diesel Winter RESCUE
Regular price From $14.99 USDSale price From $14.99 USD Regular priceUnit price / per -
ATS 11.5 INCH 14-BOLT DIFFERENTIAL COVER FITS 2001-2019 6.6L DURAMAX
Regular price $280.00 USDSale price $280.00 USD Regular priceUnit price / per -
Hamilton Cams Flat Tappet Conversion Kit for Cummins 2019-2024 Ram Trucks
5.0 / 5.0
(2) 2 total reviews
Regular price $3,150.00 USDSale price $3,150.00 USD Regular priceUnit price / per -
H&S Motorsports 2011-2024 Ford 6.7L Power Stroke Fuel Filter Conversion Kit
Regular price $179.00 USDSale price $179.00 USD Regular priceUnit price / per -
H&S Motorsports 2011-2019 Ford 6.7L Power Stroke Intake Manifold Upgrade
5.0 / 5.0
(1) 1 total reviews
Regular price From $849.00 USDSale price From $849.00 USD Regular priceUnit price / per -
Mopar 2019-2021 Ram Engine control module 68363277AA
5.0 / 5.0
(2) 2 total reviews
Regular price $2,800.00 USDSale price $2,800.00 USD Regular priceUnit price / per -
Gator Fasteners 2003-07 Ford 6.0L Power Stroke Gator Heavy Duty Head Stud Kit HSK60
Regular price $391.04 USDSale price $391.04 USD Regular priceUnit price / per$524.99 USDSale -
Tameless Performance T-Shirt
Regular price $25.00 USDSale price $25.00 USD Regular priceUnit price / per

YOUR ULTIMATE DESTINATION FOR DIESEL PERFORMANCE!
Tameless Performance breathes life into your trucks, transforming its worth through diesel performance parts. We're more than just a phrase parts store, we sell limitless possibilities. You reach new heights with every build and rest assured your diesel truck will always be construction ready. We make sure that any automobile enthusiast or a casual driver alike, has access to our top notch products specifically designed for their requirements.
WORD ON THE STREET...
-
These guys always do an amazing job! They educate me about my truck and leave me feeling well. Serviced. Extremely polite as well.Jeffrey G.Verified Customer
-
Brady and the guys have taken care of several issues with my 6.7L PowerStroke, from leaks to hoses to power loss. They are always professional and reliable and help with the little things as wellDavid S.Verified Customer
-
These guys have their act together. They were up front and honest. They did what they said they were going to do. What more can you ask for? Thank youJed G.Verified Customer
-
The guys got right on a broken rig we had from a wildfire crew working in the area.Timely, efficient and quality work.Thanks a bunchDave H.Verified Customer
-
This is the only place that I will be using to work on my truck from here on out. Aaron and his team are very organized, professional with their work and are great with communication and are honest people also! Would definitely recommend to anyone.Drew D.Verified Customer
-
These guys always do an amazing job! They educate me about my truck and leave me feeling well. Serviced. Extremely polite as well.Jeffrey G.Verified Customer
-
Brady and the guys have taken care of several issues with my 6.7L PowerStroke, from leaks to hoses to power loss. They are always professional and reliable and help with the little things as wellDavid S.Verified Customer
-
These guys have their act together. They were up front and honest. They did what they said they were going to do. What more can you ask for? Thank youJed G.Verified Customer
-
The guys got right on a broken rig we had from a wildfire crew working in the area.Timely, efficient and quality work.Thanks a bunchDave H.Verified Customer
-
This is the only place that I will be using to work on my truck from here on out. Aaron and his team are very organized, professional with their work and are great with communication and are honest people also! Would definitely recommend to anyone.Drew D.Verified Customer
DAILY DIESEL GRIND!
-
L5P Injector Connector Failure: Everything You ...
Kevin Smith!L5P Duramax injector connector failures can cause misfires, CELs, and poor performance. Learn the causes, symptoms, and how to fix or prevent the issue.
L5P Injector Connector Failure: Everything You Shoul...
L5P Duramax injector connector failures can cause misfires, CELs, and poor performance. Learn the causes, symptoms, and how to fix or prevent the issue.
Kevin Smith!Learn More -
Why It’s Important to Upsize Diesel Fuel System...
Kevin Smith!Upsizing your diesel fuel system—especially the injectors—offers more horsepower, better efficiency, and future upgrade potential. Here's why bigger really is better.
Why It’s Important to Upsize Diesel Fuel System Mods...
Upsizing your diesel fuel system—especially the injectors—offers more horsepower, better efficiency, and future upgrade potential. Here's why bigger really is better.
Kevin Smith!Learn More -
Fleece Performance Engineering GM All Lights On...
Kevin Smith!Easily upgrade your GM truck’s lighting with Fleece’s All Lights On Module. Activate high beams, low beams, and fog lights together for maximum visibility in minutes.
Fleece Performance Engineering GM All Lights On Module
Easily upgrade your GM truck’s lighting with Fleece’s All Lights On Module. Activate high beams, low beams, and fog lights together for maximum visibility in minutes.
Kevin Smith!Learn More
-
FREE SHIPPING ON ORDERS
Enjoy Free Shipping on Orders over $99
-
SATISFACTION GUARANTEED
Shop with Confidence with the Tameless Guarantee!
-
WE OFFER FINANCING
Play Now, Pay Later with Easy Financing Options
-
SECURE PAYMENTS
We use SSL encryption for a secure shopping experience.