Blow-off Valves

We understand that enthusiasts like you seek the best when it comes to performance upgrades for your car. That’s why we’re proud to offer a wide range of blow-off valves from well-known brands such as GFB, Nuke Performance, and Turbosmart. With our selection of open and recirculating blow-off valves, you can take control of your vehicle and maximize its performance. Read on to discover the advantages and differences between these two types of blow-off valves and how they work.

Open Blow-Off Valves: Maximum Performance & Awesome Sound

If you’re looking for a simple, affordable, and effective upgrade, an open blow-off valve is the perfect choice. These valves release excess pressure from the turbo straight into the atmosphere, creating that signature “pshhh” sound during gear shifts and acceleration. Open blow-off valves also help reduce turbo stress and allow the turbo to spool up faster for the next throttle input.

Recirculating Blow-Off Valves

For those who prefer a more discreet sound while maintaining optimal performance, recirculating blow-off valves are the better option. These valves redirect the excess pressure from the turbocharger back into the intake system instead of releasing it into the atmosphere. By recirculating the air, system pressure is maintained, which reduces turbo lag. It’s often mentioned that newer cars and certain makes are sensitive to open blow-off valves - in those cases, recirculating valves are a better fit.

How Does a Blow-Off Valve Work?

A blow-off valve is an essential component in a turbocharged system, designed to release excess pressure from the turbocharger when the throttle is lifted or gears are changed. When the driver lets off the throttle, the throttle plate closes, and the compressed air from the turbo has nowhere to go. This is where the blow-off valve comes into play. By opening quickly, it releases the pressure either into the atmosphere (for open valves) or back into the intake system (for recirculating valves). This relieves stress on the turbocharger and prevents damage or performance loss.

What’s the Difference Between an Open and a Recirculating Blow-Off Valve?

The main difference between an open and a recirculating blow-off valve lies in where the excess pressure is released. An open blow-off valve vents pressure directly into the atmosphere, producing the distinctive “pshhh” sound and reducing load on the turbocharger. A recirculating valve, on the other hand, redirects the air back into the intake system, maintaining pressure and improving turbo response and efficiency. The choice between the two depends on your personal preference for sound and drivability, as well as what’s recommended for your specific car model.