Due to a staff holiday between 17th and 22nd August, website orders may be processed over night, so a small delay is to be expected before they are shipped.
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Use voucher code ALPSTOUR25 on our website for £5 off your order during this time.
Please note that we are either awaiting stock, or this item is custom ordered in. Please contact us for the latest lead time.
The KAVS Motorsport optimised bypass valve is a modified OEM valve designed to address the "Yo-Yo" effect in the MINI Cooper S R53 and R52. This effect occurs when the valve constantly opens and closes, typically at around 2500 RPMs, creating an on-off sensation when you depress the throttle pedal.
Our enhanced valve features an adjusted butterfly assembly that fully closes, allowing the boost to reach its maximum potential. This becomes particularly crucial when making adjustments such as changing the supercharger pulley to increase boost. Notably, our Bypass Valve is engineered to prevent air leakage between the valve and intake pipe, resulting in more boost and increased power.
To further improve performance, we have incorporated a sturdier spring to withstand vacuum conditions, ensuring it won't open prematurely. These modifications collectively yield superior throttle response for your MINI.
Includes replacement silicone hose and hose clamps.