Engine Mounts

Engine Mounts

Engine mounts are the isolating brackets that connect the engine block to the vehicle's chassis, and their condition directly affects the precision of throttle response, driveline vibration, and the reliability of front accessory drive alignment in high-torque performance applications. Factory rubber engine mounts are designed to absorb vibration for comfort at the expense of allowing the engine to move under hard acceleration and braking, which causes inconsistent driveline alignment, belt wear, and wheel hop on powerful rear-wheel-drive and all-wheel-drive builds. Polyurethane and billet aluminum engine mounts from Prothane, Energy Suspension, Innovative Mounts, and Kartboy replace factory rubber with stiffer materials that dramatically reduce engine movement under load, improving launch consistency, exhaust header clearance, and accessory belt life. Swap mounts allow builders to install an engine the chassis was not originally designed for, bridging the dimensional gap between aftermarket engine selections and factory frame rail geometry.

Popular Upgrades

Top-selling engine mount products include Innovative Mounts 62A polyurethane engine mount kits for Honda Civic, CR-V, and Integra platforms that reduce wheel hop during aggressive acceleration, Kartboy polyurethane trans mount and engine mount sets for Subaru WRX and STI that improve launch feel without introducing objectionable cabin vibration on the street, BMR billet aluminum engine mount kits for Chevrolet Camaro and Pontiac G8 that eliminate engine torque twist, and Prothane polyurethane motor mount inserts for GM, Ford, and Mopar muscle car applications. LS swap mount kits from ICT Billet and Energy Suspension provide bolt-in LS engine placement in popular muscle car chassis including first and second generation Camaro and early Nova and Chevelle platforms.

Performance and Handling

Upgrading to polyurethane engine mounts on a front-wheel-drive sport compact platform reduces torque steer under hard acceleration by keeping the engine positioned consistently relative to the drive axles, which prevents the unpredictable steering pull that occurs when rubber mounts allow the engine to pitch under load. On rear-wheel-drive muscle cars and sport sedans, billet mounts eliminate the driveshaft angle changes that cause driveline vibration at specific rpm bands by holding the engine precisely on its mounting axis throughout the rev range. Street-driven builds should choose 62A to 75A durometer polyurethane rather than solid billet for any daily driven vehicle to avoid transmitting gear and engine noise into the cabin at unacceptable levels.

How do I know if my engine mounts are bad?

Worn engine mounts typically produce a noticeable clunk when engaging the clutch or releasing the brake on an automatic transmission vehicle, caused by the engine tipping under torque load and striking the engine bay sheet metal or adjacent chassis components. Excessive vibration at idle that reduces significantly with the vehicle in neutral also suggests that collapsed or failed rubber in the factory mounts is no longer adequately isolating the engine's firing pulses from the chassis. Confirming mount condition by visual inspection with the engine under torque load, watching for visible movement of more than 5 to 10 millimeters, identifies which mounts are collapsing and need replacement.

Are polyurethane engine mounts street-legal?

Yes, polyurethane engine mounts are fully street legal and do not affect any emissions-related systems or safety-critical vehicle functions. The only practical street-use concern with polyurethane mounts is increased NVH transmission into the cabin compared to factory rubber, which ranges from barely noticeable at 62A durometer to objectionable for sensitive occupants at 80A and above. Most manufacturers offer street-and-strip formulations in the 62A to 75A range that significantly reduce engine movement compared to rubber while maintaining acceptable daily driving refinement.

Why These Parts Fit Right

Engine mounts in this collection are listed by vehicle application, chassis year, engine family, and mount location to ensure correct mounting geometry and hardware compatibility before ordering. Swap mount product pages include chassis rail dimension data and the supported engine families for each kit. Fast shipping and expert support are available for any engine mount selection or swap fitment question.

Support your drivetrain upgrades with parts from our suspension catalog, find breathing improvements in our air intake systems collection, and maximize exhaust output with upgrades from our exhaust collection.