2023 BMW X4 M40i Performance Parts

VTT Carbon Fiber Driveshaft for BMW Applications Why overpay for a carbon fiber BMW driveshaft? VTT is proud to offer a premium carbon fiber driveshaft manufactured exclusively for VTT in the USA by GCDS (Gulf Coast Driveshaft) — one of the premier driveshaft manufacturers...

The Spool wireless Ethanol Analyzer kit is a very cost-effective and robust ethanol content and fuel temperature monitoring solution. With the included smartphone app, the analyzer paired with a GM ethanol sensor can display the in-tank fuel's ethanol concentration percentage and fuel temperatures in...

Spool Stage 3 Low Pressure Fuel Pump (LPFP) – DIY LPFP Kit (Gen 2 B58) Introducing the only true plug-and-play Stage 3 LPFP solution for G-chassis BMW B58 models. This kit is compatible with all G-chassis BMWs. Please provide your vehicle's year, make, model,...

Spool Performance is proud to offer our in-house B58 Gen1 Exhaust Cam Fuel Lobe Mod service to take full advantage of our high pressure pump and injector lineup for B58 Direct Injected fuel system. Customers would need to ship their exhaust camshaft to our...

Spool Performance is proud to introduce the IFX 150, our upgraded Direct Injection (DI) injectors designed specifically for the Gen 1 B58 platform. These injectors are meticulously engineered to maintain stock-like idle and low-load characteristics while providing an impressive 50% more injector flow during...

Looking to keep the underhood heat down on your single turbo car, or build? We got you covered with our VTT-FAB Carbon Fiber Turbo Blankets. The outer shell is made of Carbon Fiber, and the inner shell is Silica Fiber. For 2500F intermittent /...

VTT is proud to offer its very own Game Changer S55/N55 to B58 Coil conversion kit for the BMW S55/N55 platforms. The 55 series of engines has notoriously had ignition problems with the factory coils, while aftermarket upgrades do exist, they can be bulky....

This includes a full set of replacement O-rings for your VTT Coolant hose kit.

Looking to convert your 5×112 M14x1.25 BMW vehicle to 5×114 to open up your wheel options? Want to drop 60% of the weight off steel options? We got covered with our VTT TITANIUM wheel stud conversion kits. These kits are Grade 5 Titanium studs,...

Looking for a way to do burnouts in your ATC13-2 Equipped Xdrive BMW that doesn’t have an RWD mode such as G-Series non-M vehicles, and SUVs? We were too! VTT is proud to offer the ONLY easy-to-install, plug, and-play Xdrive controller on the market....

Looking to fix the diff bolt issue on your G0X X3/X4, G3X 5 Series, and G1X 7 Series chassis? VTT is proud to offer our Rear diff bushing insert kit. This is pressed into the factory bushing and fills the voids in the bushing....

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 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...