A 5-angle valve job is performed to restore sealing efficiency

disassembled core

These improvements are more than just skin deep too

Perfect Fit: Custom-designed for the BMW S14 engine

enhancing engine response

ZF 8HP50 8HP51 DIY Upgrade Kit Kit:Stage 1 A 5-angle valve job isTake control of your transmission build with the ATS ZF 8HP50 8HP51 DIY Upgrade Kit, designed for enthusiasts and builders who want to upgrade their transmission in house rather than sending it in for a full rebuild. Available in Stage 0, Stage 1, and Stage 2, these kits provide carefully selected clutch components and critical hardware to handle higher power while maintaining OE drivability and shift quality. Stage 0 Street Duty Kit Perfect for daily