Precision Raceworks BMW F3x/F8x Billet Top Hat

$699.99

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OVERVIEW

The "top hat" caps the fuel pump module inside the tank — where fuel line and wiring connections meet the pump, and where clearances get tight once you add an external pump for a hybrid build. Precision Raceworks' billet top hat is machined to properly accommodate their upgraded/hybrid pump setups, replacing the factory plastic top hat with a stronger, purpose-built billet aluminum piece and eliminating the melted-connector failure mode of the factory part.

SPECS

CNC-machined, anodized billet aluminum construction — replaces the factory plastic top hat and its known-weak electrical connectors
Up to 3 high-flow fuel ports
5-bar fuel pressure regulator for factory compatibility
Replaceable high-flow fuel filter — 10-micron standard, 6-micron available, USA-made Micro-Glass element
Hermetically sealed wire pass-through (PRW's proprietary HMS design) prevents vapor/fuel from passing through the wire and supports PWM control
Built for hybrid pump setups — clearance and mounting for single-pump, dual-pump, AFS-style, Stage 3, Stage 4, and more

PARTS INCLUDED

Billet aluminum top hat
High-flow fuel fittings and plugs for unused ports
5-bar fuel pressure regulator
Replaceable fuel filter
Wiring harnesses for primary and secondary pumps (8 wires total)
In-tank hoses and clamps

TECH RESOURCES

Wiring diagram (B58 / S55 brushless): F-Series Top Hat Brushless Wiring Diagram
Intended for use alongside a PRW hybrid fuel pump upgrade (Stage 2 or higher) that adds an external pump — B58 Upgraded Hybrid Fuel Pump (F-Series)
Wiring is flying-lead and must be crimped or soldered to factory wiring (8 wires total); pump output port is 7.89mm (5/16") to fit the OEM fuel line
This is the F-Series-specific top hat — not interchangeable with the G-Series/Supra version (601-0316)
Not for sale or use in California on any pollution-controlled vehicle per CARB