2024 BMW M440i Base Performance Parts

WE CANNOT GUARANTEE FITMENT ON YOUR 2025 BMW B58, PLEASE BE SURE TO CHECK YOUR DIAGRAM AND MAKE SURE THIS MODEL IS A COMPATIBLE MODEL. WE CAN ASSIST, JUST SEND YOUR VIN TO US. Designed Exclusively for Gen 3 B58 Models Spool Performance downpipes...

Spool Performance B58 Engine Build Program DO NOT CALL. After careful consideration and increasing demand from our customers, we are proud to officially launch our B58 Engine Build Program. For years, we refrained from offering engine build services publicly due to market conditions where...

Spool Performance B58 Gen 2 / S58 Plug-and-Play Reflex+ Harness The Spool Performance Plug-and-Play Harness is the ultimate solution for installing a Motiv Reflex+ on your B58 Gen 2 or S58-powered vehicle—no cutting, splicing, or depinning required. Unlike traditional installs that require tapping into...

Spool Performance 8HP45 / 8HP50 / 8HP51 upgraded billet 7075-T6 D Clutch Drum The factory A380 cast-aluminum D-drum in the ZF 8HP45/50/51 is one of the weak links once power levels rise—prone to cracking, distortion, and oil starvation under high load and high RPM...

Spool Performance B58/S58 Plug and Play Ethanol Sensor Harness Connect our ethanol sensor harness to your ethanol sensor and your fuel controller. Our harness makes everything seemingly plug and play, no splicing or cutting of any wires. One side connects straight on the GM...

Spool Performance B58 Gen 1 Plug-and-Play Reflex+ Install Harness The Spool Performance Plug-and-Play Install Harness is the ultimate solution for installing a Motiv Reflex+ on your B58 Gen 1 -powered vehicle—no cutting, splicing, or depinning required. Why choose our harness over others? What sets...

Spool Performance ZF 8HP45 / 8HP50 / 8HP51 Billet 300M C-Hub Cog Drive The factory C-hub cog drive in ZF 8HP45, 8HP50, and 8HP51 transmissions is produced from cast steel. While adequate at stock power levels, casting brings inherent weaknesses—porosity, uneven grain structure, and...

VTT B58 (TU) HMM Delete Plate Looking to build a race car with a B58 engine?Doing a B58 swap and don’t want the complicated BMW Heat Management Module (HMM)?Need a simple -16AN or -20AN line setup instead of the factory tangle? If so, the...

Spool Performance B58 Gen 2 Auxiliary Fuel System The Spool Performance B58 Gen 2 Auxiliary Fuel System is designed for B58 Gen 2 owners pushing beyond the limits of the factory fuel system who want a solution that’s properly engineered, easy to install, and...

Spool Performance B58/S58 Billet Race Torque Converter Upgrade Introducing the Spool Performance X58 Billet Race Torque Converter, engineered for all B58 / S58-powered vehicles equipped with the ZF 8HP50, 8HP51, or 8HP76 transmissions. Built to handle serious power, our X58 converter features: Billet drive...

Spool Performance B58 Gen 2 / S58 Plug-and-Play Reflex+ Full Race Harness New stock with revised lengths, now will be able to locate your Motiv box in the passenger side cubby! This is a full replacement harness, all you will need is your Motiv...

VTT S58 / B58TU Crankcase Vacuum Pump Kit If you’re building a serious S58, or B58TU, crankcase pressure is one of the biggest hidden enemies of engine performance. Excess crankcase pressure reduces ring seal, increases blow-by, contaminates engine oil, and costs horsepower. The goal...

SPOOL B58 S58 Steel Heat Shield for Top Mount Turbo Setups Designed to protect the valve cover and fuel lines from excess heat from the downpipe

SPOOL 8HP45 / 8HP50 / 8HP51 & 8HP70 / 8HP75 / 8HP76 Billet Main Shaft We spent 3 years developing this shaft to build something we genuinely felt was missing from the 8HP market — a true billet main shaft made for serious power....

Maintain the performance and filtration efficiency of your Eventuri intake system with the genuine Eventuri Type L Replacement Filter. Specifically engineered for Eventuri’s patented reverse-mounted filter housings, this filter preserves the optimized airflow characteristics that define the Eventuri intake architecture. Unlike generic cone filters...