Spool Helix HPFP Overdrive Unit Cooling Plate The design flows naturally from

The design flows naturally from the roofline to the boot lid and is compatible with the OEM tail light arrangement

It is mounted on two brackets with a swan neck design

-ARM N54 Dual Cone Intake

Maintains smooth airflow path from intake to turbo

Spool Helix HPFP Overdrive Unit Cooling Plate The design flows naturally fromSpool Performance is thrilled to introduce our latest innovation for the N54 early N55 community: the Helix Overdrive Unit. After nearly a year of rigorous testing, we are proud to present this game changing product that unlocks new levels of performance for your high pressure fuel system. What is the Helix? The Helix is a planetary gearbox designed specifically for your high pressure fuel pump (HPFP). Similar to the technology found in automatic