EFIComponents.com's Universal Performance By-Pass Valve Assembly for all supercharger kits is IDENTICAL to those used by the major brands - just less expensive. The by-pass valve acts as a pressure-release valve that relieves un-needed and potentially hazardous pressures created by the supercharger by recirculating it through the supercharger for later use. The benefits include smoother idling, due to a reduction in blower surge, and protection against damaging head gaskets amongst other engine parts. By-pass kits are highly recommended for all supercharger applications and are required for superchargers with 7psi or higher boost ratings.

- Increases Drivability and Tune ability
- Increases Reliability for Motor & Supercharger
- Recommended for All Supercharger Applications
- Mandatory on All Applications with 7psi or Above
- Fits All Centrifugal Supercharger Makes & Applications
- Quick & Easy Installation that Requires No Mechanical Experience
---This valve requires mounting hardware unless used as a direct replacement.---

What is a By-Pass Valve, what do they do, & do I need one?
If you have looked into supercharging long enough or already have a supercharger,
I'm sure you have heard or seen the mention of using a By-Pass Valve. In this article below we hope to answer your questions regarding what a by-pass valve is, what they do, if you need one, and (if you do need one) what type do you need.

The By-Pass Valve does just that, it allows air that is being forced down the throat of your motor to be by-passed back into the supercharger or into the atmosphere, depending on the application, and the requirements of the supercharger.

Why, you might ask, is there a need to add more air by bolting on a supercharger and then take it away. The answer to that common question is, when you are force feeding a motor with air, there are times through-out the rpm-range where the motor can not handle more air. One example of this is, if an intake valve is closing on the cylinder heads, there is going to be a moment where it can not flow any air, but will immediately need air there after. Superchargers regulate the rate they flow air by the RPMs of the motor and not in those milliseconds through-out the RPM range that the motor can not handle the amount of air that the supercharger is forcing.

Even though some smaller supercharger systems don't come standard with By-Pass Valves, we recommend the use of a By-Pass Valve anytime you are forcing air into your motor, even at low boost levels. If you are running at pressures in the proximity of 7psi or above, then it is definitely mandatory to run a By-Pass Valve or your chances of damaging head gaskets, rings, seals, or other important parts of your engine are extremely high, or just a matter of time.

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