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SP-54HX-1-n55 - Spool Performance Helix HPFP Overdrive Unit - N55

Spool Performance Helix HPFP Overdrive Unit - N55

Spool Performance

T#: 9642131 | Part#: SP-54HX-1-n55

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

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$849.00

Lifetime Replacement

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Product Details

Spool Performance is a top name in the BMW Forced Induction industry. Their team of young and intelligent engineers pair their passion for the industry with a rich education background, which results in a high-quality enthusiast-minded products. Spool Performance's state-of-the-art upgrades for your BMW fueling systems are a surefire way to make more power, reliably.

The Helix from Spool is simply a planetary gearbox for your High-pressure fuel pump. The particular configuration of the gears and their spatial fixturing allows an axial increase in shaft speed from the input to the output of the unit.

The early N55 high-pressure pump is a very capable and over-engineered piece of hardware. As we start tuning and pushing more power, we start seeing drops in the high pressure. What is happening here is that the high-pressure pump is not able pump as much fuel as the injectors are injecting into the cylinders and hence causing the rail pressures to drop. The pump at this point is running out of displacement volume. With a rotary pump like the continental HPFP, an easier way to increase displacement is to spin the pump faster which results in an increased number of delivery strokes per cycle. The Helix helps you do exactly this and thus helps overcome a big limitation in early N55 fuel systems without the complexity of a secondary port injection system.

Not for sale or use in the state of California on any pollution-controlled vehicle as per the California Air Resources Board.

Prop 65 Warning

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Lifetime Replacement

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Fits These Cars

MAKE	MODEL	SUBMODEL	ENGINE	Special Fitment Notes
BMW	E70	X5	N55 3.0L	Use vehicle selector to confirm fitment
BMW	E70	X5 xDrive35i	N55 3.0L	Use vehicle selector to confirm fitment
BMW	E82	135i	N55 3.0L	Use vehicle selector to confirm fitment
BMW	E84	X1 xDrive35i	N55 3.0L	Use vehicle selector to confirm fitment
BMW	E88	135i	N55 3.0L	Use vehicle selector to confirm fitment
BMW	E90	335i	N55 3.0L	Use vehicle selector to confirm fitment
BMW	E90	335xi	N55 3.0L	Use vehicle selector to confirm fitment
BMW	E92	335i	N55 3.0L	Use vehicle selector to confirm fitment
BMW	E92	335xi	N55 3.0L	Use vehicle selector to confirm fitment
BMW	E93	335i	N55 3.0L	Use vehicle selector to confirm fitment
BMW	F07	535i	N55 3.0L	Use vehicle selector to confirm fitment
BMW	F07	535i xDrive	N55 3.0L	Use vehicle selector to confirm fitment
BMW	F10	535i	N55 3.0L	Use vehicle selector to confirm fitment
BMW	F10	535i xDrive	N55 3.0L	Use vehicle selector to confirm fitment
BMW	F10	ActiveHybrid 5	N55 3.0L	Use vehicle selector to confirm fitment
BMW	F12	640i	N55 3.0L	Use vehicle selector to confirm fitment
BMW	F12	640i xDrive	N55 3.0L	Use vehicle selector to confirm fitment
BMW	F13	640i	N55 3.0L	Use vehicle selector to confirm fitment
BMW	F13	640i xDrive	N55 3.0L	Use vehicle selector to confirm fitment

*The above product applications have been written by Turner Motorsport. All warranties, product application, fitment, and performance are the responsibility of Turner Motorsport. For additional information see the terms of use.