Twin Power 84-91 Evo Big Twin Rocker Box Gasket Kit Replaces H-D 17038-90

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 gasket kits are essential for any major engine service, rebuild, or head replacement, providing matched sets of gaskets in a single purchase that ensures all sealing surfaces are renewed simultaneously. A proper gasket kit from a quality manufacturer includes the head gasket, intake manifold gasket, exhaust manifold gasket, valve cover gasket, front cover seal, and all accessory gaskets required for a complete engine teardown and reassembly. Using a quality gasket kit rather than individual gaskets sourced from different suppliers ensures consistent material quality across all sealing surfaces and simplifies the parts sourcing process for engine rebuilds. Whether servicing a blown head gasket, completing a bottom-end rebuild, or refreshing a high-mileage engine, a full gasket kit is the most efficient and reliable way to approach the job. Popular Upgrades Fel-Pro full gasket sets are the most popular choice for domestic engine rebuilds, covering GM LS and LT engines, Ford Mod...