King Performance Cam Bearing Set – GM V8 SBC | Coated | CS507HPT

King Engine Bearings CS507HPT coated performance cam bearing set for GM V8 engines in the small-block Chevrolet (SBC) family, covering 4.3–5.7L displacements including the 305 and 350. Complete set of cam bearings for a full engine rebuild or camshaft replacement service. King’s HPT (high-performance) coating reduces friction during cold start and break-in, improves oil film retention at the cam journal surface, and provides additional protection under the elevated oil temperatures and pressures of a performance build. 0.48 lbs. Ships fast across Canada and the US.

Camshaft Bearings — Function and Replacement

Camshaft bearings are pressed into the cam bearing bores machined into the engine block and support the camshaft’s journals as it rotates. Unlike rod and main bearings (which are split shell bearings installed in two halves), cam bearings are one-piece round bore bearings pressed into place with a cam bearing installation tool — they cannot be installed by hand and require proper press tooling for correct seating depth and alignment. Oil pressure is fed to the cam bearings through the block’s oil gallery, lubricating the cam journal-to-bearing interface. Worn cam bearings result in excessive cam journal clearance, reduced oil pressure (as oil bypasses the worn bearing clearance), accelerated camshaft lobe wear, and in severe cases, camshaft seizure. Cam bearings must be replaced any time the camshaft is removed from the block — during a full engine rebuild or a cam swap on a performance build.

King HPT Coating — Performance Advantage

King’s HPT (high-performance) bearing coating is applied to the bearing’s sliding surface. The polymer-based coating reduces the coefficient of friction at the cam journal interface, which is particularly important during cold starts (when oil pressure and film thickness are lowest) and during engine break-in (when surface-to-surface contact is highest before machined surfaces fully seat). In a performance or race engine context, coated cam bearings also provide additional protection during the momentary oil starvation events — hard cornering, high-G braking, or oil surge under acceleration — that can starve the cam galleries before the oil system recovers. The coating does not substitute for correct oil clearance specification and proper assembly oil or break-in lube — these remain essential.

GM Small-Block V8 Fitment

The CS507HPT is listed by King for GM V8 engines in the 4.3–5.7L displacement range, primarily covering the Chevrolet small-block V8 (SBC) engine family — one of the most widely produced and rebuilt V8 engine families in history. Key applications include the SBC 305 (5.0L, common in 1976–1992 Camaro, Firebird, and trucks) and the SBC 350 (5.7L, used across Camaro, Corvette, trucks, and marine applications throughout its production run). The SBC block shares a common cam bearing bore specification across its displacement range, making a single bearing set applicable to multiple displacements. Confirm your specific block and engine variant against King’s application data — some 4-bolt main and high-performance block variants may have different cam bore specifications.

Verify fitment against King’s CS507HPT application guide before ordering. Cam bearings require press tooling for installation — professional engine builder installation recommended. Use assembly lube or break-in oil on bearing surfaces during installation. Replace as a complete set — do not mix new and used cam bearings.

Specifications

• Brand: King Engine Bearings
• Part Number: CS507HPT
• Type: Camshaft bearing set — coated (HPT)
• Application: GM V8 SBC — 4.3 / 5.0 / 5.7L (305 / 350 and related)
• Sold as: Complete cam bearing set
• Coating: King HPT high-performance polymer coating
• Weight: 0.48 lbs