Spool Stage 2 ZF 8HP45/50/51 Transmission DIY Parts Kit – BMW

Spool Performance Stage 2 ZF 8HP45/8HP50/8HP51 DIY Transmission Parts Kit is a complete internal upgrade package for high-output BMW applications using these ZF 8-speed transmissions.

• Supplier-rated for more than 1000 ft-lb torque capacity
• Upgraded Spool friction materials
• Heat-treated and hard-anodized billet 7075 C and E hubs
• Custom pressure/apply plates and increased clutch counts
• Pre-clearanced clutch packs with additional steels supplied for builders who prefer custom clearance

Selectable option: choose whether to include the Spool high-volume billet aluminum oil pan.

Fitment: BMW ZF 8HP45/50/51 applications. Confirm the transmission code or VIN before ordering.

Dispatch: Special order — allow 2–3 weeks.

Product System

• Drivetrain
• Transmission & Driveline

Vehicle Fitment

• BMW 2 Series F22 Lci B58 ZF 8HP5x
• BMW 2 Series F23 Lci B58 ZF 8HP5x
• BMW 3 Series F30 Lci B58 ZF 8HP5x
• BMW 3 Series F31 Lci B58 ZF 8HP5x
• BMW 4 Series F32 Lci B58 ZF 8HP5x
• BMW 4 Series F33 Lci B58 ZF 8HP5x
• BMW 4 Series G22 B58 ZF 8HP5x
• BMW 4 Series G23 B58 ZF 8HP5x
• BMW 4 Series Gran Coupe F36 Lci B58 ZF 8HP5x
• BMW 4 Series Gran Coupe G26 B58 ZF 8HP5x
• BMW 5 Series G30 B58 ZF 8HP5x
• BMW 7 Series G11 740I B58 ZF 8HP5x
• BMW 7 Series G12 740Li B58 ZF 8HP5x
• BMW M240I G42 B58 ZF 8HP5x
• BMW M340I G20 G21 B58 ZF 8HP5x
• BMW X3 G01 B58 ZF 8HP5x
• BMW X4 G02 B58 ZF 8HP5x

Confirm chassis, engine, drivetrain and production-year compatibility before ordering.

Available Options

High Volume Aluminum Oil Pan +2 Qts Capacity

• Do not include
• Include High Volume Aluminum Oil Pan

Supplier Part Numbers

SP-ZF-SF-S3, SP-ZF-SF-S3-PAN

Built by Boost & Tune Support

BBT can assist with fitment review, installation, supporting modifications, configuration and calibration requirements where applicable.