Since one of the reasons for changing out the factory diverter valves was to prevent boost leaks (from prematurely opening on high boost), causing boost leaks while upgrading the diverter valve would be counterproductive.  During our research and development, the connection at the throttle body was looked over very carefully.  The factory diverter valve is connected to the throttle body using an o-ring inside the throttle body flange which is locked in place by a c-clip, which works very well.  It also make removal/installation quick and easy.  Our testing had shown it could hold quite a bit of boost.  During our testing, we had pressure tested this connection up to 25 PSI.  The reason why we stopped at 25 PSI was because at 25 PSI, one of the intake pipes on the turbo blew off and we could not test any higher.  Hoewver, we were confident that it would easily hold over 25 PSI as the throttle body flange showed no signs of failing.  Also, keep in mind, this type of connection is used throughout the engine, in many crutial areas like the coolant radiator system as well as the clutch system.  If BMW did not believe in the durability of this type of connection, they would not use it in such important areas.

Many of our competitors use a silicone hose connection for the throttle body connection.  It is not designed for a silicone hose connection which is used by all the other brand diverter valve pipe upgrades in the market.  The throttle body lip is too short and there are no "beads" to prevent the silicone hose from blowing off under boost.  Even though it is the easiest way to  "rig" together, it is not ideal.  The best way to connect the new diverter valve pipe to the throttle body is to replicate the same connection which we did.  We spent a lot of resources developing and manufacturing this factory style connection for this reason.

The same issue came with the MAP sensor.  The MAP sensor seals to the factory diverter valve pipe via a o-ring on the sensor itself.  Having a hole in a silicone hose will definitely cause a boost leak as it will not properly seal.  Therefore, again we CNC machined our own replica MAP sensor flange that utilizes the same factory o-ring seal.

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 our 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.

Blow Off Valves (BOV):

The standard option for our Diverter Valve Upgrade Pipe is designed for either the factory diverter valves or aftermarket "factory style" diverter valve.  Also available is the TIAL Blow Off Valve option which utilizes the TIAL Q Blow Off Valve (BOV).  The TIAL Q BOV features a large 50mm (2") valve to quickly discharged built up boost pressure.  Since the TIAL Q BOV vents to the atmosphere which causes no restriction to venting boost, it reacts faster than recirculated diverter valves.  The internal valve spring can be changed out to different spring rates which allow adjustability.  This allows versatility as it allows you to increase the spring pressure in the future for when you run higher boost levels.  Therefore, it eliminates the need to purchase another BOV or diverter valve if you increase boost levels.  Essentially, this is the last blow off valve you will ever buy.  The TIAL Q BOV is available in 6 different colors: black, polished silver, red, blue and purple.  The black color option is standard.  If you want any other color, please specify when ordering.

Due to popular demand, we are now offering our Diverter Valve Charge Pipes with the Synapse Synchronic Blow Off Valve flange welded to our Diverter Valve Charge Pipe.  You can order it with just the flange welded on or with the Synapse Synchronic BOV included.  The Synapse BOV option requires an aluminum flange that is not included in the Synapse BOV Kit (unlike the TIAL BOV which is included).  The Synapse aluminum BOV flange is $25 extra.

HKS Super Sequential Blow Off Valve (SSQV) 4 Blow Off Valve (BOV).  You can order it with just  the HKS BOV flange welded on or with the SSQV BOV included.  We include only genuine HKS SSQV 4 (no oversea knock offs like you see on E-bay).  The HKS BOV is designed to make a loud sound when releasing.  Choose this option if you want all your neighbors to hear you coming down the street.