products > Blow-off Valves


Turbosmart Blow Off Valves are manufactured with a focus on performance and reliability.  Turbosmart Blow off valves (also known as diverter valves, recirc valves, DV's etc) are made in Australia from tough and durable billet aluminium. Turbosmart offers a complete range of solutions from OE Replacement and heavy duty upgrades through all performance and street applications, race and of course for motorsport use. The Kompact range from Turbosmart are a range of upgraded valves to suit road cars, for normal and high performance and tuned use. The Kompact range of BOV's includes the Kompact EM (Electro-Mechanical) series which takes the best of a mechanical valves reliability and adds integration with factory control electronics and strategies. The Kompact range from Turbosmart relies on Turbosmart's proven positive seal piston , boost-balance system for years of reliability and trouble free motoring. The BOV5 range, our 5th iteration of a true performance valve, shares the same boost-balance, positive seal piston technology as the Kompact Range. High flowing than the Kompact range for higher Horsepower setups with a huge list of bolt-on, model specific and Universal Applications. The BOV 5 range bridges the gap in the space between street and race where greater flow is needed in higher performance applications.  For high horsepower and no compromise, Turbosmart offer the Raceport, Power Port and Big Bubba Ranges. With solutions based on both positive seal piston and diaphragm style valves, there are solutions for every application!

Kompact RANGE including KOMPACT EM

HIGH PERFORMANCE | HD / BOLT-ON UPGRADE | STREET - Up to 400HP (28mm Piston) With bullet-proof, billet construction the Kompact range is a direct replacement & Upgrade for OEM parts. Kompact including Kompact EM (Electro-Mechanical) is designed with a focus on quality materials, design and integration. The Kompact range by Turbosmart gives vehicles the high performance edge in boost handling capacity, reliability & response, whilst being competitively priced.


 HIGH PERFORMANCE | HD / BOLT-ON UPGRADE | STREET | RACE - Up to 600HP (38mm Piston) Designed for high flow and performance, the BOV5 from Turbosmart is well suited for both street and race vehicles. Designed around a 38mm Piston and using our unique boost-balance technology, there's no amount of boost that will escape this proven classic. The BOV5 line incorporates clever modular design, with precision machining and assembly - All Australian made, by hand and tested prior to shipping.

Race Port

ULTRA-HIGH PERFORMANCE | STREET | RACE | SUPERCHARGED - Up to 2500HP (50mm Valve) An amazingly small and light BOV for forced induction competition level engines, the Race Port has race proven results from street, strip and circuit. Featuring our unique collar design, twin 1/8”NPT pressure ports and internal flow structures, it is 50% lighter and 25% smaller than the competition, while flowing 330 CFM - making it the highest flowing BOV of it’s type on the market.

Big Bubba

HIGH PERFORMANCE | STREET | RACE | SUPERCHARGED | DIESEL PERFORMANCE - Up to 1500HP (2"/50.4mm Piston) Designed for large capacity supercharged and turbocharged engines, including turbo-diesels, the Big Bubba is our largest piston style Blow-Off Valve. The Big Bubba range features precision engineering, bigger inlet and outlet ports, hard anodised and light weight aluminium pistons, along with a strong v-band mounting system.

Power Port

ULTRA-HIGH PERFORMANCE | RACE | SUPERCHARGED - Over 3000HP (60mm Valve) The Power Port is Turbosmart’s largest and highest flowing Blow-Off Valve ever, resetting the flow benchmark set by our popular and highly regarded Race Port BOV. The Power Port’s massive 2.5in inlet, unprecedented valve lift, supersized ports and carefully designed CFD flow-paths mean it has more than enough breathing room for even the most powerful turbocharged drag racing engines, preventing damaging compressor surge and throttle plate damage at the end of the quarter mile, even at the most extreme boost levels.

BOV Controller

HIGH PERFORMANCE | STREET | RACE | DIESEL PERFORMANCE | SUPERCHARGED  The Turbosmart BOV controller is an electronic device which controls the pressure signal to the BOV. It works by detecting a negative voltage change in throttle position. It then energises a solenoid to vent all of the air out of the BOV cap, causing a pressure differential between the piston of the BOV and the cap which will vent pressure from the intake system.

Spares and Accessories

Looking for spare parts or servicable items for your Turbosmart product? Look no further. We carry everything to get ensure that your Turbosmart part is always running at its peak performance. Turbo seal constant tension clamps and additional springs specially designed to work with your Turbosmart products.