This unit features full aluminum construction providing maximum long-term durability

Please note that these 148 mm connecting rods are designed to fit BMW B58 engines found in the following applications:

Optimal cover strength also translates into superior clamping force over the same area

Adjustable coilover upper mounts

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5150 AutoSport Factory+ Rebuild Kit, BMW S14 Engine:S14B25 This unit features full aluminumYou love your naturally aspirated BMW. You know you could add more power with a turbo conversion, but you already love the way it sounds, feels, and drives. Many customers aren't interested in the extra wear and tear of forced induction, power lags, or a crowded engine bay. For the classic BMW enthusiast interested in rebuilding their engine with bulletproof internals, were introducing the 5150 Factory+ Kit. A carefully curated, budget friendly option