King Engine Bearings

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The best King Engine Bearings for your build are the XP and XPC series performance bearings — XP for high-output street engines and XPC for extreme race clearances — sized to your crankshaft journal (STD, or undersize like +.25 for a reground crank). Subaru EJ20/EJ22/EJ25, Nissan VQ35 and VQ37, and Mazda Miata applications are all covered, so match the bearing series and size to your engine and your machine shop's measurements. King is the go-to bearing brand in the engine-building world. Bearings live between your crankshaft and connecting rods, and their alloy, crush, and oil clearance decide whether a built motor survives boost. This collection covers rod bearings , main bearings , and thrust washers across King’s performance lines: the standard XP series with its hardened-steel-backed, high-load tri-metal design, and XPC coatings that add extra embedability for race use. What to look for: always order by journal size (STD vs. undersize) after your crank is measured — never guess. Pair bearings with the right assembly lube and verify oil clearances with Plastigage or a bore gauge during assembly. If your crank was reground, you need the matching undersize set, not STD. Popular brands: this collection is dedicated to King Engine Bearings . Builders pairing bearings with forged internals also shop CP Pistons and JE Pistons , and browse Engine Builds for the full parts list. Shop related: King Nissan VQ35DE STD Rod Bearings · King 52mm Rod Bearings for WRX/STI EJ Engines · King VQ35HR/VQ37VHR/VR30 +.25 Rod Bearing Set · King Miata Thrust Washer Set · Engine Builds · Engine Dressing · Shop All Engines · A Guide to Subaru Engine Modifications King Engine Bearings FAQ What size bearings do I need — STD or undersize? Match the bearing to your crankshaft: use STD for an unground crank and an undersize set (e.g. +.25) for a reground crank. Your machine shop’s journal measurements decide. What’s the difference between King XP and XPC? XP is King’s performance tri-metal bea