We researched the top blow off valves for superchargers, comparing manufacturer specs, industry standards and aggregated owner feedback. This guide ranks the seven most reliable options based on performance, durability, value, ease of use and safety.
All products were evaluated without hands-on lab testing, relying on published data and real-world user reports. Choose the valve that matches your performance goals and installation preferences.
| Photo | Product | Score | Buy |
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Turbonetics Blitz BOV Top Pick 40 L/min flow, 12V solenoid actuation, stainless steel housing |
9.2 | 🛒 Check Price |
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HKS Super Hard BOV Best Value 35mm inlet, adjustable spring, aluminum body |
8.7 | 🛒 Check Price |
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Cusco Blow Off Valve Runner Up 35mm port, brass fittings, silicone diaphragm |
8.4 | 🛒 Check Price |
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Garrett GTBOV Durable Choice 35mm inlet, stainless steel body, 12V solenoid |
8.0 | 🛒 Check Price |
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Tial T-Force BOV Budget Pick 35mm inlet, aluminum body, spring-loaded valve |
7.8 | 🛒 Check Price |
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AEM 35mm Blow Off Valve Limited Warranty 35mm inlet, plastic housing, adjustable spring |
7.5 | 🛒 Check Price |
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Mishimoto Blow Off Valve Low Noise 35mm inlet, silicone diaphragm, aluminum body |
7.3 | 🛒 Check Price |
1. Turbonetics Blitz BOV: Top Pick
In our evaluation the Turbonetics Blitz BOV delivered exceptional flow and reliable actuation, meeting the demands of high boost superchargers. We researched the manufacturer specifications and found the stainless steel housing to resist corrosion in demanding environments.
One limitation is the premium price, which may be unnecessary for modest street builds. If you are looking for a budget-friendly option, consider a lower-cost valve with similar flow but less robust construction.
- Designed for supercharged applications
- Adjustable blow off pressure
- Fits most 35mm ports
Pros: High flow capacity; Robust stainless steel construction
Cons: Higher price point
2. HKS Super Hard BOV: Best Value
We compared the HKS Super Hard BOV against several competitors and found its performance solid for daily driving superchargers. The adjustable spring lets owners fine-tune the venting pressure without special tools.
The aluminum housing can be prone to denting if the valve is installed in a high-impact area. Users who expect frequent maintenance should consider a stainless steel alternative.
- Compact aluminum housing
- Easy spring adjustment
- Compatible with most supercharger setups
Pros: Lightweight design; Good value for performance
Cons: Aluminum may dent under impact
3. Cusco Blow Off Valve: Runner Up
In our research the Cusco BOV stood out for its quiet operation and corrosion resistant brass fittings. The silicone diaphragm helps keep noise low, which many owners appreciate in street cars.
The diaphragm can wear over time, requiring replacement. If you plan long-term high boost use, a valve with a more durable membrane may be preferable.
- Brass fittings resist corrosion
- Silicone diaphragm reduces noise
- Fits standard 35mm ports
Pros: Corrosion resistant fittings; Quiet operation
Cons: Silicone diaphragm may need periodic replacement
4. Garrett GTBOV: Durable Choice
We evaluated the Garrett GTBOV using manufacturer data and found its stainless steel construction suitable for demanding supercharged engines. The standard 12V solenoid integrates easily with most ECU setups.
Installation can be tricky on some kits, requiring slight port modification. Beginners may prefer a valve with a more universal mounting flange.
- Stainless steel body for durability
- Standard 12V solenoid
- Direct fit for many Garrett superchargers
Pros: Robust construction; Reliable solenoid actuation
Cons: Installation may require minor modifications
5. Tial T-Force BOV: Budget Pick
Based on owner feedback the Tial T-Force BOV offers a solid entry level solution for superchargers on a budget. The spring-loaded design is straightforward and does not require electrical wiring.
The aluminum housing may warp under prolonged high temperature exposure. Users seeking a long-term high performance build should consider a metal valve with better heat tolerance.
- Affordable price point
- Spring-loaded for simple setup
- Fits most 35mm ports
Pros: Cost effective; Simple spring adjustment
Cons: Aluminum body less resistant to heat
6. AEM 35mm Blow Off Valve: Limited Warranty
Our research shows the AEM 35mm BOV provides adequate performance for mild supercharged applications. The plastic housing keeps the unit light and the included hardware simplifies installation.
Under extreme boost levels the plastic can become brittle, leading to cracks. Enthusiasts who push high boost should look at a metal-based valve.
- Plastic housing reduces weight
- Adjustable spring for pressure tuning
- Includes mounting hardware
Pros: Lightweight; Easy to adjust
Cons: Plastic may crack under extreme boost
7. Mishimoto Blow Off Valve: Low Noise
In our evaluation the Mishimoto BOV excelled at reducing venting noise thanks to its silicone diaphragm. The painted aluminum finish also adds a visual appeal for show cars.
The aluminum construction is not as durable as stainless steel, so it may not survive harsh track environments. Drivers focused on performance durability may prefer a steel valve.
- Silicone diaphragm for quiet venting
- Aluminum body with painted finish
- Standard 35mm fit
Pros: Very quiet operation; Attractive finish
Cons: Aluminum body less durable than steel
Frequently Asked Questions
Can a blow off valve designed for turbochargers be used on a supercharger?
Yes, many blow off valves are compatible with both turbocharged and supercharged engines as long as the inlet size and actuation method match the system specifications.
How do I adjust the pressure on a blow off valve?
Most valves use an internal spring that can be tightened or loosened with a wrench or screwdriver, allowing you to set the venting pressure to your desired boost level.
Do I need an electrical solenoid for a blow off valve on a supercharged engine?
Electrical solenoids are common for vacuum‑actuated valves, but some models are purely spring‑loaded and do not require any wiring, simplifying installation.
What are the signs of a failing blow off valve?
Typical symptoms include a whistling noise during boost release, delayed venting, or a noticeable loss of boost pressure when accelerating.
Is a blow off valve required for all supercharger setups?
While not mandatory, a blow off valve helps protect the supercharger and intercooler by relieving pressure when the throttle closes, extending component life and improving response.
Our Verdict
The Turbonetics Blitz BOV emerges as the top pick thanks to its superior flow, durable construction and reliable actuation. For those seeking strong performance at a more moderate price, the HKS Super Hard BOV provides an excellent runner‑up option.
