Spool - Helix HPFP Overdrive Unit – BMW 135i / 335i E8x / E9x N54 / N55 bmw-1-series-f2x---11-20-120i-esi8940930 Toepassing: Audi A4 / Allroad

Toepassing: Audi A4 / Allroad / A5 2

Coils + NGK R7437-8 – Up to 10% more ignition power and spark plugs with a cooler heat rating for reliable combustion during heavy tuning

Designed to increase power and torque by replacing the standard restrictive boost pipes and improving airflow

Heat range 10: Stage 2 / 3+

Spool - Helix HPFP Overdrive Unit – BMW 135i / 335i E8x / E9x N54 / N55 bmw-1-series-f2x---11-20-120i-esi8940930 Toepassing: Audi A4 / AllroadThe Spool performance Helix HPFP Overdrive Unit has been developed for BMW N54 and early N55 engines to significantly increase the capacity of the original high pressure fuel pump (HPFP). By increasing the HPFPs rotational speed, the volume of fuel delivered is increased, thereby preventing pressure drops at higher power outputs. This provides an effective solution for high power builds without the complexity of additional port injection systems.