You 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, we’re introducing the 5150 Factory+ Kit. A carefully curated, budget-friendly option for those looking to rebuild their Naturally Aspirated engine and keep the E30 M3 legend alive for years to come.

This kit includes everything you need to refresh and bulletproof your rotating assembly, and features the best components on the market for modest NA upgrades:

• ARP2000 Head Stud Kit
• Cometic Multi-Layer Steel Head Gasket
• CP-Carrillo Forged Piston Set
• SP Components Connecting Rod Set
  • ARP Connecting Rod Bolts
• ARP Main Stud Kit

Ideal for both resto-modders interested in extending the life of their engine and road racers who push their NA motors to the upper limits on track.

Please note: All engine modifications should be performed by a qualified professional to ensure a proper and safe installation process and a reliable, optimally performing engine.

BMW S14 Applications:

BMW S14B20

1989-1991      E30     320is [Portugal and Italy]

BMW S14B23

1986-1991      E30     M3
1986-1987      E30     M3 Evo I
1988      E30     M3 Evo II

BMW S14B25

1990      E30     M3 Sport Evo (Evo III)