KING LS-series Rod and Main Bearing Set for 4.8L/5.3L/6.0L V8 — Standard Size STD, Complete Kit

KING rod and main bearing set MB5293SI STD & CR807SI STD is a standard-size replacement bearing kit engineered for Chevrolet LS-series V8 engines including 4.8L, 5.3L, and 6.0L applications.

This complete bearing set from KING supplies standard-diameter main and rod bearings designed to fit a broad range of GM LS-family engines. The kit covers common displacements used in trucks and performance cars—4.8L (293/294 CID), 5.3L (325 CID), 5.7L (346 CID), 6.0L (364/365 CID) and 6.2L (376 CID) variants—across model years noted for Vortec, LS1/LS6, LS2, LS3 and LS9 platforms. It ships as standard size; if your crank requires undersize/oversize shells, options and substitutions are available with prior notice.

Which LS engines will these KING bearings actually fit?

These bearings are specified for standard-diameter crank journals used in many GM LS engines. They cover multiple CID displacements and model ranges where the original bearing journals remain within factory tolerances.

• Compatible with 293/294CID (4.8L) 1999–2013 Vortec engines.
• Fits 325CID (5.3L) 1999 & newer Vortec and LS4 engines.
• Includes compatibility for 346CID (5.7L) 1997–2005 LS1 and LS6 engines.
• Fits 364/365CID (6.0L) and 376CID (6.2L) LS2, LS3, LS9 and later Vortec variants.

Are these bearings standard size, and what if my crank needs a different size?

Yes — the kit ships with standard-size main and rod bearings. If your crank journals were machined during an overhaul, you may require undersize or oversize bearings; that must be confirmed before ordering to ensure proper oil clearance and longevity.

• Standard (STD) shells included by default.
• Message the seller immediately if you need oversized or undersized shells.
• Provide journal measurements or machine shop spec to verify sizing needs.

What should I know about availability and possible substitutes?

KING is the intended brand for this listing, but supply can fluctuate. If KING stock is depleted, reputable alternatives such as Clevite A Series or ACL Brand A Series may be supplied as equivalent quality substitutes to avoid delays.

• Substitutes used only when KING inventory is unavailable.
• You can message the seller to check current KING stock before purchase.
• All substitute options are high-quality, OE-style bearing lines suitable for LS builds.

How should I prepare my engine or machine shop for installation?

Confirm journal diameters and micrometer measurements before installing standard bearings. Use proper assembly lube, and follow torque and clearance specifications from your engine builder or factory shop manual for reliable operation.

• Measure crank journals and pistons for correct clearances.
• Install with recommended assembly lubricant and torque sequence.
• Replace oil pump and filters if engine overhaul is performed.

Who is this for: This KING MB5293SI STD & CR807SI STD bearing set is intended for mechanics, engine builders and DIY enthusiasts rebuilding or servicing GM LS-series V8 engines that retain standard journal diameters. It’s ideal for truck owners restoring Vortec motors, performance builders refreshing LS1/LS2/LS3 variants, or anyone needing a direct-fit, factory-dimension bearing kit. If your rebuild requires oversize bearings or you want to confirm brand availability before ordering, contact the seller with your crank measurements or machine shop specs to ensure a perfect match.