Brands
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ISR Performance
ISR Performance Aluminum BOV Modular Flange Kit - Greddy
$27.50
$26.13
Go Fast Bits
MACH 2 Atmosphere Conversion Kit (Suits T9100, T9101,T9102,T9104,T9105,T9135)
$44.00
$39.60
Go Fast Bits
MACH 2 Atmosphere Conversion Kit (Suits T9103, T9133)
$44.00
$39.60
Go Fast Bits
MACH 2 Atmosphere Conversion Kit (Suits T9120)
$36.50
$32.85
Go Fast Bits
Mach 2, atmosphere conversion kit (T9107, T9125)
$36.50
$32.85
Alta
ALTA 07-12 Mini Cooper S/JCW & 09-12 Convertible / 09-12 Clubman S/JCW BPV Spring Upgrade
$27.00
$22.95
Perrin Performance
PERRIN 15-21 Subaru WRX Turbo Adapter Flange - Black
$75.00
$56.25
Torque Solution
Torque Solution VW MK8 2.0T Evo4 / Audi B9 3.0T Blow Off Valve Adapter
$55.54
Torque Solution
Torque Solution Mercedes-Benz C/E/G/S-Class Blow Off Valve Adapter
$133.32
Torque Solution
Torque Solution 2015+ Ford Mustang Blow Off Valve Adapter
$72.21
Torque Solution
Torque Solution Blow Off Valve Adapter: Volkswagen Golf/GTI
$66.66
Torque Solution
Torque Solution HKS Blow Off Valve Adapter Hyundai Veloster 1.6T 2013+
$49.99
Get your blow off valve mounted, sealed, and tuned right. Shop weld-on flanges for custom charge pipes, adapters that fit a universal valve to your vehicle, springs that match your idle vacuum and boost level, recirculation kits that plumb air back into the intake, and O-rings and rebuild parts that restore sealing. Most accessories are matched to a specific BOV brand, series, and flange style, so check your valve model before ordering. Many common blow off valve problems, from leaking at idle to opening under boost, are fixed with the right spring or fresh seals rather than a new valve.
They're the parts that connect a blow off valve to your charge pipe, set how it responds, control where the vented air goes, and keep it sealed over time. For builders, they include the flanges and adapters needed to mount a valve. For owners, they include the springs and rebuild parts that fix leaks and tune behavior.
Mount the flange on the cold side charge pipe, close to the throttle body, for the fastest response to throttle closure. Position it where the valve has clearance for service and the outlet won't spray debris or oil onto nearby parts. Weld it so the valve's inlet faces the airflow path without restricting the pipe. Test fit the valve before final welding.
Blow off valve accessory questions usually come down to fit, spring choice, and fixing a valve that leaks, flutters, or causes stalling. The answers below cover the most common BOV accessory problems, including idle leaks, valves opening under boost, flange leaks, and MAF-related stalling, plus how to choose springs, flanges, adapters, and recirculation kits. Because most accessories are matched to a specific BOV brand and model, confirm compatibility on each product page before you buy. For help tuning your blow off valve setup, talk with your tuner or contact our team.
The spring is commonly too soft for your engine's idle vacuum, or an O-ring is worn. A stiffer spring, more preload, or new seals usually fixes it.
It depends on idle vacuum and boost level. Low-vacuum engines commonly need softer springs; high-boost setups commonly need stiffer ones.
Generally no. Flange styles are commonly brand and series specific. Match the flange to your valve.
On MAF-equipped engines, recirculating vented air commonly prevents the rich condition that causes stalling after a blow off valve install.
On the cold side charge pipe, close to the throttle body, with room for the valve and service access.
When it leaks, responds slowly, or won't hold boost despite the correct spring. New O-rings or a diaphragm commonly restore performance.
Removing the valve leaves the turbo unprotected from compressor surge. Block-off plates are typically for setups that relocate the valve elsewhere.
