Upgrade your Jeep Wrangler TJ (1997–2006) with high-quality off-road parts and accessories designed for strength, performance, and rugged style. Whether you’re restoring a classic trail rig or building a capable crawler, Underdog Motorsports has the gear to get your TJ ready for adventure.
Our selection includes lift kits, suspension components, control arms, off-road bumpers, skid plates, wheels, tires, lighting, and recovery gear—all from top-tier brands known for Jeep performance.
Bring your TJ to life with parts built to handle tough terrain while delivering solid ride quality and aggressive looks. Start your Jeep Wrangler TJ build today with help from the off-road experts at Underdog Motorsports
The heavy-duty TeraFlex TJ Rear CRD60 Semi-Float Axle Housing provides maximum protection, performance, and durability for the TJ Wrangler, while the exclusive Constant Radius...
The heavy-duty TeraFlex TJ Rear CRD60 Semi-Float Axle Housing provides maximum protection, performance, and durability for the TJ Wrangler, while the exclusive Constant Radius...
The heavy-duty TeraFlex TJ Rear CRD60 Semi-Float Axle Housing provides maximum protection, performance, and durability for the TJ Wrangler, while the exclusive Constant Radius...
The heavy-duty TeraFlex TJ Rear CRD60 Semi-Float Axle Housing provides maximum protection, performance, and durability for the TJ Wrangler, while the exclusive Constant Radius...
The heavy-duty TeraFlex TJ Rear CRD60 Semi-Float Axle Housing provides maximum protection, performance, and durability for the TJ Wrangler, while the exclusive Constant Radius...
The heavy-duty TeraFlex TJ Rear CRD60 Semi-Float Axle Housing provides maximum protection, performance, and durability for the TJ Wrangler, while the exclusive Constant Radius...
The heavy-duty TeraFlex TJ Rear CRD60 Semi-Float Axle Housing provides maximum protection, performance, and durability for the TJ Wrangler, while the exclusive Constant Radius...
The heavy-duty TeraFlex TJ Rear CRD60 Semi-Float Axle Housing provides maximum protection, performance, and durability for the TJ Wrangler, while the exclusive Constant Radius...
The heavy-duty TeraFlex TJ Rear CRD60 Semi-Float Axle Housing provides maximum protection, performance, and durability for the TJ Wrangler, while the exclusive Constant Radius...
The unloaded Tera CRD60 HD Rear Axle Assembly w/ Semi-Float includes semi-float outer axles, Super 60 bearings, inner axle shafts, and sensors. Add your...
Best Selling ProductsJeep Off-Road Parts & AccessoriesJEEP WRANGLER TJJeep Wrangler TJ Off-Road Parts & AccessoriesNewest Off-Road Products | Tacoma, 4Runner, Tundra, GX, BroncoTrack Bar|Track Bar / Drop Brackets|Suspension|Suspension / Steering / Brakes
The front axle experiences tremendous amounts of lateral force while turning and those effects increase exponentially during off-road driving. The TeraFlex TJ: Front High...
Best Selling ProductsJeep Off-Road Parts & AccessoriesJEEP WRANGLER TJJeep Wrangler TJ Off-Road Parts & AccessoriesNewest Off-Road Products | Tacoma, 4Runner, Tundra, GX, BroncoTrack Bar|Track Bar / Drop Brackets|Suspension|Suspension / Steering / Brakes
The front axle experiences tremendous amounts of lateral force while turning and those effects increase exponentially during off-road driving. The TeraFlex TJ: Front HD...
Best Selling ProductsJeep Off-Road Parts & AccessoriesJEEP WRANGLER TJJeep Wrangler TJ Off-Road Parts & AccessoriesNewest Off-Road Products | Tacoma, 4Runner, Tundra, GX, BroncoTrack Bar|Track Bar / Drop Brackets|Suspension|Suspension / Steering / Brakes
The front axle experiences tremendous amounts of lateral force while turning and those effects increase exponentially during off-road driving. The TeraFlex TJ/ZJ/XJ/MJ: Front HD...
The TeraFlex TJ/ZJ XJ/MJ: Front Upper Shock Stem Eliminator Kit converts the front upper shock mount from a stem-eyelet to an eyelet-eyelet design enabling...
Best Selling ProductsJeep Off-Road Parts & AccessoriesJEEP WRANGLER TJJeep Wrangler TJ Off-Road Parts & AccessoriesNewest Off-Road Products | Tacoma, 4Runner, Tundra, GX, BroncoTransfer Case Shifter Shaft|Transfer Case|Drivetrain & Differentials
The TeraFlex 2003-06 TJ/LJ Shift Linkage Plate may be necessary to properly locate the transfer case linkage on TJ Wrangler and LJ Wrangler Unlimited...
Best Selling ProductsJeep Off-Road Parts & AccessoriesJEEP WRANGLER TJJeep Wrangler TJ Off-Road Parts & AccessoriesNewest Off-Road Products | Tacoma, 4Runner, Tundra, GX, BroncoOil Pan Skid Plates|Skid Plates|Armor|Bumpers & Armor|Exterior Parts & Car Care
The TeraFlex TJ/LJ 4.0L Heavy-Duty Oil Pan Skid Plate Kit protects the underside of your TJ Wrangler or LJ Wrangler Unlimited's 4.0-liter I-6 engine...
Best Selling ProductsJeep Off-Road Parts & AccessoriesJEEP WRANGLER TJJeep Wrangler TJ Off-Road Parts & AccessoriesNewest Off-Road Products | Tacoma, 4Runner, Tundra, GX, BroncoSteering Box Skid Plate|Skid Plates|Armor|Bumpers & Armor|Exterior Parts & Car Care
Protect one of the most vulnerable components of your TJ Wrangler or LJ Wrangler Unlimited with the TeraFlex TJ/LJ Heavy-Duty Steering Box Skid Plate...
Best Selling ProductsJeep Off-Road Parts & AccessoriesJEEP WRANGLER TJJeep Wrangler TJ Off-Road Parts & AccessoriesNewest Off-Road Products | Tacoma, 4Runner, Tundra, GX, BroncoTransmission Skid Plates|Skid Plates|Armor|Bumpers & Armor|Exterior Parts & Car Care
Protect the underside of your TJ Wrangler or LJ Wrangler Unlimited with the TeraFlex TJ/LJ 4.0L I-6 Heavy-Duty Transmission Pan Skid Plate Kit. Attaches...
Best Selling ProductsJeep Off-Road Parts & AccessoriesJEEP WRANGLER TJJeep Wrangler TJ Off-Road Parts & AccessoriesNewest Off-Road Products | Tacoma, 4Runner, Tundra, GX, BroncoTransfer Case Bearing and Seal Overhaul Kit|Transfer Case Overhaul Kit|Transfer Case|Drivetrain & Differentials
This TJ/LJ/YJ/XJ NP231 Short Shaft Kit increases the rear driveshaft length by 4 inches, which eliminates the need for a Transfer Case Lowering Kit...
Best Selling ProductsJeep Off-Road Parts & AccessoriesJEEP WRANGLER TJJeep Wrangler TJ Off-Road Parts & AccessoriesNewest Off-Road Products | Tacoma, 4Runner, Tundra, GX, BroncoTransfer Case Bearing and Seal Overhaul Kit|Transfer Case Overhaul Kit|Transfer Case|Drivetrain & Differentials
The NP231 Extreme Short Shaft Kit is what short-wheelbase Wrangler owners have been dreaming about for decades. Not only does the Extreme Short Shaft...
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