The Precision Raceworks F-SERIES (F3x/F2x) B58 HIGH PERFORMANCE FUEL PUMPS are designed for customers looking to run all blends of E85. These drop in pumps include a Walbro fuel pump capable of flowing up to 300% more fuel than the factory fuel pump and are 100% E85 compliant. Best of all this pump ships completely assembled and ready to install we don’t even have a core charge. Pump, Fuel filter, performance fuel lines, and sending unit included, nothing extra needed!   By design a fuel pump such as this is ideal for daily driving and racing applications of all kinds. This system keeps the primary pump fully submerged in fuel regardless of tank level or the g-force the car is subjected to.   Stage 3 (5 Liters per minute)Our Stage3 bucketed/bucketless hybrid fuel pump includes all necessary wiring and pump activation switch (hobbs switch). This pump utilizes the OEM brushless pump in the bucket with a Walboro 450 (F90000274) fuel pump outside the bucket. This pump can support up to 900whp! (Rated for 850whp on 100% E85) and is drop in ready. No wires to cut or splice, nothing to assemble, simply drop the pump system into the tank, insert the factory pump, slide the bucketless bracket onto the side of bucket and close the top hat you are ready to go! Included in the box Genuine OEM fuel pump bucket assembly Pre-assembled with OEM Brushless and mounted Walboro 450 Includes fuel sending unit (fuel level sensor) Plug and play boost reference harness (zero cutting, stripping, crimping) 13psi boost reference switch (hobbs switch)   Stage 4 (5.5 liters per minute)Our Stage4 bucketed/bucketless hybrid fuel pump includes all necessary wiring andpump activation switch (hobbs switch). This pump utilizes the OEM brushless pump in the bucket with a Walboro 450 (F90000274) fuel pump outside the bucket. This pump can support up to 1,000whp! (Rated for 950whp on 100% E85)and is drop in ready. No wires to cut orsplice, nothing to assemble, simply drop the pump system into thetank, insert the factory pump, slide the bucketless bracket onto the side of bucketand close the top hat you are ready to go! Included in the box Genuine OEM fuel pump bucket assembly Pre-assembled with OEM Brushless and mounted Walboro 450 Includes fuel sending unit (fuel level sensor) Upgraded AN-6 fuel feed lines with fuel pressure regulator and return lines New In-Line Fuel Filter Plug and play boost reference harness (zero cutting, stripping, crimping) 13psi boost reference switch (hobbs switch)   Stage 4.5 (6 literes per minute)Our Stage4 bucketed/bucketless hybrid fuel pump includes all necessary wiring andpump activation switch (hobbs switch). This pump utilizes the OEM brushless pump in the bucket and a second Walbro 525 (F90000285)fuel pump outside the bucket. This pump can support OVER 1,000whp! (Rated for 1000+whp on 100% E85)and is drop in ready. No wires to cut orsplice, nothing to assemble, simply drop the pump system into thetank, insert the factory pump, Slide the bucketless bracket onto side of bucketand close the top hat you are ready to go! Included in the box Genuine OEM fuel pump bucket assembly Pre-assembled with OEM Brushless and mounted Walboro 450 Includes fuel sending unit (fuel level sensor)<> Upgraded AN-6 fuel feed lines with fuel pressure regulator and return lines<> New In-Line Fuel Filter Plug and play boost reference harness (zero cutting, stripping, crimping) 13psi boost reference switch (hobbs switch)   This is a true plug and play solution that anyone can install intheir home garage and start taking advantage of the benefits right away. For more details see the specifications tab SPECIFICATIONS Factory BMW pump Pump flow 72psi (5bar): 3.55 LPM Pump Weight: Horsepower Supported Pump Gas: Horsepower Supported 100% E85: Stage 4 Pump flow 72psi (5bar): 5.5 LPM Pump Weight: Horsepower Supported Pump Gas: 1,000+ Horsepower Supported 100% E85: 950 Aftermarket EKP Required: No Stage 4.5 Pump flow 72psi (5bar): 6 LPM Pump Weight: Horsepower Supported Pump Gas: 1,000+ Horsepower Supported 100% E85: 1,000+ Aftermarket EKP Required: No What's Included: Precision Raceworks High Performance Fuel Pump