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Blow-Off Valves, 50mm, Black/Natural, Billet Aluminum, 3 in. V-Band, Each

"Turkey gobble," "dove call," "wastegate chatter," or "dose" (if you live among kangaroos). All different names for the same phenomenon: compressor surge. Compressor surge might sound cool when you let off the throttle, but what you're hearing is the rapid slowing of your turbocharger's compressor. This brutal deceleration puts a tremendous amount of force on the compressor wheel, shaft, and bearings. With high-boost pressures, compressor surge can cause rapid wear and damage to your turbo.

The best solution to compressor surge is to prevent it with a high-quality blow-off valve. These Mishimoto blow off valves feature a 50mm piston and vent-to-atmosphere design that quickly and effectively releases pressure from the intake system, preventing it from making its way back to your turbo. The billet aluminum body and piston are precision CNC-machined to provide durable and reliable performance for even the most demanding turbo systems.

The blow-off valves feature high-quality Viton© O-rings to effectively seal in boost pressure until you're ready to release it. The included 90-degree and straight boost reference fittings allow you to easily plumb a 6mm (1/4 in.) plastic line to your intake manifold, and Mishimoto's available setup springs let you tune your blow-off valve for optimum performance. The valves come pre-assembled with a blue spring to suit vehicles with 5.07-7.25 psi of idle vacuum. To make mounting easy, each blow-off valve is available with a 50mm (2 in.) hose connection or a pre-coped aluminum V-band mount to fit 2.5 in. or 3.0 in. piping.