SPOOL Quad-Fuel Pump Activation Harness + Relay Box

SPOOL Fuel Pump Activation Harness Built with high-power builds in mind, the new SPOOL Fuel Pump Activation Harness is the ultimate plug-and-play solution for fueling system upgrades. Engineered to support up to four Walbro auxiliary fuel pumps, this harness is ideal for setups requiring maximum flow and reliability under extreme conditions. Controlled via ground trigger activation, it seamlessly integrates with your vehicle’s existing systems — no custom wiring, no soldering, no guesswork. Designed primarily for BMW F and G chassis platforms, but fully compatible with virtually any application, this harness ensures consistent, dependable power delivery to your fuel pumps when you need it most. Say goodbye to long hours of harness fabrication and connector sourcing. This kit saves over 5 hours of wiring time and eliminates the hassle of chasing down high-amp connectors. Whether you're building a high-HP street car or a dedicated track machine, this harness was built to keep up with your fueling demands.