Stealth FX blow-off valve

38mm o-ring

3 x M5 grub screws

3 x M5 nuts

• Fingertip control over how loud your shifts are! By simply turning the lower ring of the cap, you can adjust how much air is vented to the atmosphere or to the inlet, giving you complete noise control over your shifts!


• For cars with sensitive air-flow meters, you can dial in the valve to eliminate common problems normally associated with aftermarket valves... and still get a great sound.


• No tools needed for spring adjustment. Spring adjustment is achieved by a unique mechanism contained completely within the valve, meaning that no tools are required for adjustment. This also ensures the profile remains as low as possible, as the cap does not move up and down when adjusting.


• Unique piston seals achieve the best possible seal on both ends of the piston. Now, as well as our acetal piston seat, a low friction, lubricant-impregnated polymer piston ring is incorporated. This system is far more reliable than o-rings, which require frequent maintenance and replacement.


• Tight engine bays are NO problem! The vacuum nipple is free to rotate through 360 degrees to make fitting easier.

Colors available: Black only.