Aluminum Race By-Pass Valve (Polished, Direct Replacement)
valve is a direct replacement for the Bosch valve. The Bosch valve is made from
plastic and contains a rubber diaphragm which is actuated by engine vacuum.
The valve is used to release pre-throttle body manifold pressure on deceleration.
Race Bypass Valve is made from CNC machined 6061 billet aluminum and can withstand
higher boost pressures and the higher charge temperatures. The OE Bosch valve
is a part that is prone to failure in stock applications and particularly on
'chipped' vehicles. Bosch have revised their valve design several times but
by using the Billet Aluminum one you will have the assurance that once this
valve is fitted, it will not need to be replaced.
Race Bypass Valve has been bench "flow tested" and results show that
it flows just over 10% more capacity. The greater airflow capacity means that
on aftermarket and higher boost applications, air turbulence is reduced and
the possibility MAF turbulence is minimized.
Pass Valve can be open up to change out the internal parts.
Flow test results:
20 CFM at 7" and 48 CFM at 49.9"
22 CFM at 7" and 52 CFM at 49.9"