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1990 WHITE/GMC WCM 10
0L A18A1 A20A1 A20A3 BS BT D15B2
The ST18121 valve seat is designed to meet the rigorous standards of engine rebuilding
Includes both standard and premium ring options for flexibility in performance and durability
Part Numbers: WP130-7170
Enginetech S93116-.50 Engine Premium Piston Ring Complete Set for GMC Envoy and Chevrolet Trailblazer Engine Oil Pump 1990 WHITE/GMC WCM 10The Enginetech S93116 . 50 Engine Premium Piston Ring Complete Set is designed to deliver reliable performance and longevity for your engine. Crafted with precision, this set includes top compression rings, second compression rings, and oil rings, all engineered to meet strict SAE guidelines for consistent end gaps. The top and second compression rings have a thickness of 1. 20 mm, while the oil ring measures 2. 50 mm in thickness, ensuring optimal