RockJock TJ/LJ/YJ 4.0L Only Heavy Duty Motor Mount Kit w/ Hardware

This engine parts collection covers oil catch cans, thermostats, thermostat housings, radiator components, coolant accessories, engine covers, fuse box covers, cap covers, throttle bodies, supercharger pulleys, idler pulleys, tensioner pulleys, and engine bay dress-up parts for trucks, SUVs, muscle cars, boosted builds, high-horsepower street cars, and performance vehicles that need better reliability, cooling, airflow, oil control, and under-hood styling. The collection is particularly strong for Dodge Challenger, Charger, Durango, Jeep Grand Cherokee Trackhawk, and Ram TRX platforms running 6.2L Hellcat, 6.4L HEMI, and 5.7L HEMI engines, where oil catch can and cooling upgrades address known OEM weaknesses in the PCV and thermal management systems. Import performance platforms including GM LS-based builds, Chevrolet Camaro, and Corvette applications are also represented through Mishimoto, CSF, and ZPE GripTec product lines. Builders who invest in engine bay organization and reliab...

This engine block collection covers bearings, gaskets, engine mounts, block off plates, block heaters, PCV valves, sleeves, and engine bay accessories for performance builds, engine refreshes, OEM-style replacement, diesel truck upgrades, HEMI builds, Hellcat and Trackhawk platforms, LS swaps, Honda swaps, Nissan VR38DETT builds, and Toyota truck engines. Main bearings, rod bearings, and connecting rod bearings from ACL Race Series, King Engine Bearings, and Clevite are the most critical internal components for builders refreshing the rotating assembly on street cars, drag builds, or engines being prepared for forced induction. Engine mounts and polyurethane mount upgrades from Innovative Mounts and Kartboy address drivetrain movement in sport compact and high-torque performance applications. Gasket kits from Cometic and MAHLE seal the oil, coolant, and exhaust passages in both stock-displacement and overbore engine combinations.Popular UpgradesBest-selling products include ACL Race...

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 af...