Engine Piston 12589635 — Compatible with Buick LB8, L34, L46, and LW9 Engines

The Buick LB8 and L34 2.5L V6 engines utilize standard 89mm bore piston assemblies (Part Number 12589635), with packaging dimensions of approximately 56 × 40 × 20. The L46, LB8, and LW9 3.0L engines share the same connecting rod bearings (12480252/12480255). The 3.0L V6 engines typically employ specific pistons designed exclusively for the 3.0L displacement.