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Blow Off Valve Kits

A blow off valve goes under many different names such as dump, bypass, recirc (short for recirculation), diverter, and pop off valves. No one term is correct, the lingo just tends to change in different regions and countries. Basically these valves are all designed to the same job, and we will refer to all types as blow-off valves to save confusion.

What it does: The only job a blow-off valve is supposed to perform is to relieve excess turbo pressure that results from shutting the throttle rapidly under boost conditions. This then answers one of the questions we get asked a lot – yes you need a turbo to fit a blow-off valve! Otherwise you will have a rather expensive paper-weight. It is necessary to release this pressure because it will try to find a way out of the system, and the only way is back out through the turbo. This produces a fluttering noise as the air passes backwards through the turbo, which is often unwanted. There is also a school of thought that a blow-off valve can improve turbocharger longevity or, in extreme cases, prevent damage to the turbo.

Blow Off Valve Kits

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Great exhaust

This exhaust is awesome, has a low grumble to it and sounds amazing! I love it, much meaner exhaust than I was expecting but so happy with it.

Great price!

Came packaged nice, looks great! Thanks HP direct!

Perfect. Quick response to questions and fast shipping.

Great job

Received in a timely manner and was exactly what we were looking for. Great job!

Ford Focus RS mk2 Volvo S60R K1 forged connecting rods

Quality durable branded low cost conrods. Seller shipped quickly. Thank you.