it is a MUST to drill and tap the four outer 9mm holes in the engine block to increase their size to 11mm holes

The all-new compressor cover design features flow enhancements and advanced machining techniques for 15% more airflow and efficiency at higher pressure ratios

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CP-Carrillo pistons are the best choice for any M54B28 engine and application

Mishimoto Lifetime Warranty: Guaranteed performance and longevity

S14 EVO3 Billet Crankshaft by 5150 AutoSport F35 it is a MUST toDue to the challenges in sourcing the S14B25 Evo3 2. 5L crankshaft from BMW, we have decided to offer a 4340 billet steel crankshaft at a comparable or lower price than BMW. The dimensions are identical to the BMW Evo3 specifications, allowing you to use factory main and rod bearings, factory pistons, and factory connecting rods. This will be a great upgrade for the S14B20 and S14B23 engine. NEW 5150 Billet Stroker crankshaft for the BMW S14 cylinder