Note: Fits all vehicles with the
Diverter Pipe Color Options:
another parts development directly from our 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 brought 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 pipe.
On the factory diverter valve pipe features a sound baffle for the
diverter valves. This sound baffle is connected on the side of the
factory diverter valve 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. Our Diverter Valve
Pipe Upgrade eliminates this sound baffle and thus
eliminating the unnecessary turbulence in the diverter
valve pipe, keeping charge intake air velocity at it's maximum. 3" 6061
Aluminum piping was used to properly match the size of the throttle body
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.
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. The throttle body
lip is machined to accept this c-clip. 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. Therefore, we
CNC machined our own replica throttle body flange that utilizes the same
factory o-ring and c-clip for our Diverter Valve Pipe Upgrade.
NOTE: Meth Bungs are now an available
option on the Evolution Racewerks Diverter Pipe.
The Tial BOV comes in a
standard black finish, Please call in if you prefer a different color
What are Meth Bungs?
A Meth Bung Hole are predrilled and threaded holes designed for the use
of a meth kit.