Amber Performance are an Approved Forge Motorsport Reseller. Boost Pipe for BMW F2X & F3X. Many of you will already be aware that the original plastic charge pipe is a real weak link on the N55, and over the last 6 months we have received many requests after the charge pipes fail. If you take a look at the images above you can see how the coupler becomes brittle leading to cracking, fracture and ultimate failure. Our alloy replacement uses a CNC coupler to ensure this is a permanent solution. We would recommend that whilst replacing this you also consider our FMKT135F20. (please see our other listings for this hose). The Forge boost pipe for BMW F2X & F3X will Increase throttle response and decrease turbo lag. The Forge boost pipe allows you to retain the factory style O-ring throttle lock flange. Precision CNC couplers allows for a quick and easy connection and disconnection. The alloy hard pipes are powder coated to allow for a more durable hard wearing product. You can retain the factory electronic diverter valve. This replaces OEM Pipe Part No. Make – BMW Model – M135i (F20/F21), M235i (F22/F23/F87), 335i, 435i & M2 F22 (NOT X-DRIVE). If you require your parts quickly then please check stock before ordering to avoid any unexpected lead time.