BMW S14 400 Series NA Power Pack

The 400 Series Power Pack is the one-click forged internals kit for naturally aspirated BMW S14B23 engines, delivering modern performance for this legendary engine. Designed for enthusiasts aiming for 400HP, this kit is a major upgrade over aging OEM components, offering improved strength, durability, and reliability.

Featuring Arias Forged Pistons (94mm bore, 11:1 compression) and SP Components Connecting Rods, this kit is built for high-revving, naturally aspirated performance. Whether you're restoring an E30 M3 or building a high-output street or track machine, this kit provides a strong foundation without the hassle of sourcing rare factory parts.

Quality and Performance for the S14

• SP Components Forged Connecting Rods – Precision-engineered for the S14B23, these rods provide exceptional strength, allowing for increased RPM capability.

• Arias Forged Pistons (94mm Bore, 11:1 Compression) – Manufactured from high-strength alloy, these pistons deliver improved thermal stability and durability for high-rev applications.

Why Choose the 400 Series Power Pack?

• Modern forged internals – A superior alternative to aging factory components.

• Optimized for naturally aspirated builds – 11:1 compression ratio for responsive throttle and high-revving performance.

• One-click solution – No need to track down rare components; this kit is engineered for direct compatibility.

• Rated for 400HP – A proven upgrade for street and track applications.

Piston Set Includes:

- Pistons
- Rings (Install Guide Here)
- Pins
- Locks
- Spec Sheet

As the BMW S14 platform ages, sourcing OEM internals becomes increasingly difficult. Our 400 Series Power Pack offers a reliable, high-performance alternative, ensuring that your S14B23 build is ready for spirited driving and competitive track applications.

BMW S14B23 Applications

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