Spool Performance is excited to introduce our B58 DIY Stage 3 Kit, designed for enthusiasts seeking a cost-effective solution to fueling challenges. This DIY kit offers similar flow rates as our plug-and-play option but at a significantly lower price point. It includes everything you need to add a secondary boost-activated low-pressure pump, resolving any low-side fueling capacity issues. With straightforward assembly instructions provided, this kit is simple to install.

Kit Includes:

• 1x Genuine Walbro 450 Fuel Pump (modified with two-way quick connect fitting)
• 1x Billet Aluminum Pump Holder
• 1x Filter Side Quick Connect Nylon Hose
• 1x Pump Side Quick Connect
• 1x Spare Nylon Hose
• 2x Crimp Clamps
• 2x Screw-On Clamps
• 1x Hardware Pack
• 1x Activation Harness (Select Harness Option)

If Hobbs Switch Harness option selected:

• 1x Boost-Activated Switch
• 1x Boost Reference Adapter

Vehicle Fitment:

• F30 LCI: 340i, 340i xDrive
• F31 LCI: 340i, 340i xDrive
• F34 GT LCI: 340i, 340i xDrive
• F32: 440i, 440i xDrive
• F32 LCI: 440i, 440i xDrive
• F33: 440i, 440i xDrive
• F33 LCI: 440i, 440i xDrive
• F36 Gran Coupé: 440i, 440i xDrive
• F36 Gran Coupé LCI: 440i, 440i xDrive