Perfect Circle SH1990S Camshaft Bearing Set for Chrysler HEMI 5.7L 6.1L

The Perfect Circle SH1990S is a precision-engineered camshaft bearing set designed specifically for 2003-2010 Chrysler HEMI V8 engines with 5.7L and 6.1L displacement. Manufactured by Clevite MAHLE, this bearing set features the proven Clevite 77 tri-metal construction that delivers superior performance and durability for demanding engine applications.

Advanced Tri-Metal Construction:

• Steel backing provides structural support and dimensional stability
• Cast copper-lead alloy center layer offers exceptional strength and durability
• Nickel dam ensures chemical stability and corrosion resistance
• Electroplated Babbitt overlay delivers optimal slipperiness, conformability, and embedability

Precision Engineering:

• Precision-bored design eliminates the need for machining after installation
• Standard shaft diameter: 2.1245" to 2.1265"
• Bearing outer diameter (housing bore): 2.2528" to 2.2542"
• OE reference number: 3901306
• B1 material specification for consistent quality

This complete camshaft bearing set is engineered to meet or exceed OEM specifications, making it an ideal choice for engine rebuilds, performance upgrades, and professional applications. The Clevite 77 design incorporates bearing technology often superior to original equipment, ensuring long-lasting performance and reliable engine operation.