Collection: Engine
UTV Engine Parts
Whether you're rebuilding after a failure or building more power, we carry UTV engine parts and performance upgrades for the most popular side-by-side platforms. From internal engine components to intake and fuel system upgrades, find what you need to keep your machine running strong.
- Pistons & Rings — OEM-spec and high-compression pistons for stock rebuilds and performance builds
- Camshafts — Performance cam upgrades for improved power and throttle response
- Intake & Fuel Systems — Air filters, intake kits, and fuel controllers for better airflow and tuning
- Gaskets & Seals — Full gasket sets and individual seals for engine rebuilds
- Model-Specific Fitment — Parts matched for Polaris, Can-Am, Kawasaki, Yamaha, and more
Shop UTV engine parts at Relentless Powersports.
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Polaris OEM Engine – 2020 RZR XP Turbo S
Regular price $6,524.00 USDRegular priceUnit price / perSale price $6,524.00 USD -
Bikeman Performance Polaris RZR Pro R STM Secondary Clutch
Regular price $2,350.00 USDRegular priceUnit price / perSale price $2,350.00 USD -
Bikeman Performance Polaris RZR Pro R Inner Primary Sheave
Regular price $579.95 USDRegular priceUnit price / perSale price $579.95 USDSold out -
Bikeman Performance Polaris RZR Pro R STM Primary Clutch
Regular price From $2,350.00 USDRegular priceUnit price / perSale price From $2,350.00 USD -
Bikeman Performance Polaris RZR Pro R Custom Valve Cover
Regular price $299.95 USDRegular priceUnit price / perSale price $299.95 USD -
Bikeman Performance Polaris RZR Pro R Silicone Intake (Throttle Body to Airbox)
Regular price $169.95 USDRegular priceUnit price / perSale price $169.95 USD -
Bikeman Performance Polaris RZR Pro R Silicone Intake (Inlet to Airbox)
Regular price $169.95 USDRegular priceUnit price / perSale price $169.95 USD -

Bikeman Performance Polaris RZR Pro R / Xpedition / 2024+ RZR XP 1000 Power Vision 3 MG1 + Tune
Regular price $599.95 USDRegular priceUnit price / perSale price $599.95 USDSold out -
Bikeman Performance Polaris SXS ECU Unbricking Service
Regular price $100.00 USDRegular priceUnit price / perSale price $100.00 USD -
Bikeman Performance Polaris SXS / Can-Am Maverick X3 (Non-RR) ECU Hard Flash Service
Regular price $499.95 USDRegular priceUnit price / perSale price $499.95 USDSold out -
Bikeman Performance Polaris RZR Pro R Torque Link ECU Tuner
Regular price $299.95 USDRegular priceUnit price / perSale price $299.95 USDSold out -
ECU TUNE TORQUE LINK LICENSE / PRO R
Regular price $499.95 USDRegular priceUnit price / perSale price $499.95 USD -
BIG BORE 2150cc / PRO R
Regular price $4,495.95 USDRegular priceUnit price / perSale price $4,495.95 USD -
PORTED HEAD KIT / PRO R
Regular price $6,995.90 USDRegular priceUnit price / perSale price $6,995.90 USD -
BIG BORE STROKER + AIR EXTREME / PRO R
Regular price From $16,595.95 USDRegular priceUnit price / perSale price From $16,595.95 USD -
BIG BORE + AIR EXTREME ENGINE / PRO R
Regular price From $12,895.95 USDRegular priceUnit price / perSale price From $12,895.95 USD











