Riss Racing Stage 3 Diverter Valve and Charge Pipe Kit BMW 135i 08+

Mirroring the functions of the BMW stock DV system, Riss Racing incorporated new technology which will allow you to run higher boost safer and hold more power. 100% mandrel bent to ensure smooth bends and flow through the entire pipe! The stock piece has rubber hoses that bend and flex under pressure. On some turbo cars (i.e. Eclipse Turbo 4G63) hard piping actually made power on the dyno! More WHP/WTQ from getting rid of the leaky rubber hoses for the intercooler. The RR DDV Kit was made for the N54 motor (135/335/535) which specifically was engineered from the factory to divert air back into the intake track. This will allow you to maintain perfect idle under any circumstances. (They have heard in some cases, BOV kits that blow into the atmosphere give a jumpy tach needle when revving). Riss Racing wanted to build a product that outperformed the stock BMW DV s, but maintained the exact characteristics of the vehicle. Exact to the specifications of DV s were made to do. Your Riss Racing DDV Kit will include everything needed for an easy install. The Riss Racing DV s are constructed of T6 6061 Billet Aluminum so there was no sacrifice in quality and material. Your kit will also include 3 springs for you to fine tune your system. Depending on the mods you have on your vehicle, you may need to use a different spring. Soft/Medium/Hard. Harder springs are for cars pumping out more boost. You should be fine with the Medium or Hard spring with your N54. All O-rings will be included and installed in your DV before installation. There will also be 2 washers included in your kit to fine tune your preload. T-Bolt clamps will be added in to make sure there are no boost leaks anywhere in the pipes. Riss Racing opted for the best with these kits because of the importance it has. The Silicone hoses are made to fit and the DV hoses will be extra long to give you slack in case you want to cut them to your perfect length.