Again, another parts development directly from ER's 135i Time Attack racing program. The factory diverter valves were causing an issue of not being able to hold up against the rigors of high boost application, therefore they needed to be replaced. Thus attention was brough to the factory diverter valve pipe and the need to optimize for maximum performance on a race car facilitated the need for a new pipe to be built. Often ignored, charged intake airflow characteristics greatly affect throttle response, turbo lag and ultimately maximum power potential. Smooth bends and minimal obstructions are ideal. This is not the case with the factory diverter valve charge pipe. On the factory diverter valve chargepipe features a sound baffle for the diverter valves. This sound baffle is connected on the side of the factory diverter valve charge pipe which splits airflow. This causes turbulence inside the pipe which slows the charge intake air velocity (speed of the air traveling inside the pipe). By removing this turbulence (by eliminating the factory diverter valve sound baffle), increased throttle response, decrease turbo lag and ultimately higher maximum power potential can be realized. ER's Diverter Valve Charge Pipe eliminates this sound baffle and thus eliminating the unneccesary turbulence in the diverter valve pipe, keeping charge intake air velocity at it's maximum. Apparrently, BMW thought the same thing as later model (2009-10) did not come with this baffle.
Charge Pipe Finishes:
The Diverter Valve Charge Pipe is available in the same 2 finish options as our intercoolers. It is available in a mirror polish finish. It is also available in ER's Type III Hard Black Anodizing for the guys that want the stealthy, factory look. An added benefit of the Type III Hard Black Anodizing is that it hardens the aluminum piping and makes it more durable against accidental damage (like dropping the pipe).
We also offer our Diverter Valve Charge Pipe in any anodizing color of the rainbow you want (special order) and is available in only Type II Anodizing (asthetics). It is available as a special order item and is not stock.
Brush (or plain) finish is also available.
1/8" NPT Bungs (For Methanol or Nitrous Injectors):
With the popularity of methanol injection systems and nitrous systems, we have added the option of having a 1/8" NPT threaded bung (for methanol or nos injectors) welded to our diverter valve charge pipe. This allows quick and easy installation of methanol/nitrous injectors that are used in methanol injection systems and nitrous systems. You have the option of adding 1 or 2 injector bungs. Each 1/8" NPT bung will come with a plug so that you can run with or without the methanol injector. This is perfect for those who do not have the Methanol Injection yet but plan to do so in the future.