Blow Off Valves
Blow Off Valves (also called diverter valves, bypass valves, or recirculating valves) release excess boost pressure from turbocharged systems to prevent compressor surge and extend turbo life.
NGR Performance offers high-performance blow off valves, including the well-known NGR Type-S BOV — inspired by the original GReddy Type-S blow off valve. Designed for both street and racing use, it delivers fast valve response and a distinct metallic whistle sound.
Crafted from 6061 billet aluminum, this universal blow off valve fits a wide range of custom and OEM turbo setups and comes with all necessary hardware for easy installation.
Key Features & Benefits:
- Prevents compressor surge and turbo wear
- Compatible with atmospheric or recirculating setups
- CNC-machined from 6061 billet aluminum
- Pressure-tested up to 100 PSI
- Quick boost release for improved throttle response
- Fits most turbocharged vehicles (universal design)
- Includes vacuum hose, hardware kit, and 1-year warranty
- Performance and sound you expect from the NGR Type-S BOV
More about our high-performance blow-off valves for turbocharged builds
If you’re looking for unmatched power and performance, then our blow-off valves are just the thing you need to transform your vehicle into your dream racing machine. When boost pressure spikes, you need parts that react fast. Our blow-off valves are made for drivers who want reliable turbo protection, crisp throttle response, and that signature release sound every time they lift off the gas. That way, you know your turbo is protected from compressor surge while you gain speed and enjoy that authentic whistle sound every racer yearns for.
The NGR Type-S turbo BOV is built for street, strip, and custom turbo setups, offering a balance of durability and performance, which is fitting as it’s inspired by the GReddy Type S BOV design. With its proven Type-S styling, it delivers the quality and fitment support expected from NGR, with reliable pressure handling and the signature metallic whistle that many drivers know and love, but with NGR’s own fit, finish, and attitude. Our universal blow-off valves are made to work with a wide range of turbocharged vehicles, which is why they’re so popular for custom builds, swaps, and upgraded factory turbo systems.
Choose from multiple colors and pair your turbo BOV with the right flange, adapter, or recirculating fitting to dial in your setup exactly how you want it. Whether you’re chasing sound, response, or added turbo protection, these blow-off valves are built to perform under pressure. If you’re an enthusiast who cares about more than just how your vehicle sounds, then there’s something for you in our collection. You’ll find everything from replacement diaphragms to full universal blow-off valves to get the right fit for your build.
Frequently Asked Questions
The NGR Type-S turbo BOV is universal, but whether it’s compatible with your vehicle will also depend on your flange, piping, and setup (whether you are running atmospheric or recirculated).
For this reason, always check your setup before placing an order.
The NGR blow-off valves are inspired by the classic GReddy Type S BOV and support many compatible Type-S accessories while offering NGR’s own performance design and parts support.
Our valves can be used for both street and road racing, but the best results will depend on choosing the right flange, adapter, and spring setup for your build.
