Detroit Tuned Bypass Valve

Detroit Tuned Bypass Valve

(74 reviews) Write a Review
1.00 LBS
$12.99 (Fixed Shipping Cost)

The Detroit Tuned Bypass Valve is a re-worked new OEM valve that is modified by Detroit Tuned to eliminate the "Yo-Yo" in the MINI Cooper S's, the yo-yo was more prevalent for the early 2002-2004 cars but could happen in any of the years. What is the "Yo-Yo" effect? It's the opening and closing of the valve around 2500 rpm's so that it feels like you're stepping on and off the gas, but you're not. So we added a stronger spring to overcome the vacuum condition that it sees so that it will not open as soon or as much.  Our BPV closes at 6" of vacuum, as opposed to the factory value of 0" of vacuum. MINI tired to fix the problem in the 2005-2006 cars with a ECU tweak but it never really worked correctly for a lot of cars. This was the main reason our BPV was created, but there are a lot of benefits, read on!

The DT BPV uses a stiffer return spring, resulting in quicker boost generation, and thus quicker throttle response and transitions. Most cars see about 1psi total more boost @ redline. The butterfly assembly is also adjusted as much as possible to close fully, allowing for maximum boost. This is done by centering of the butterfly door and adjustment of the set screw that sets the openness of the butterfly. Perfect for the aggressive driver or racer. It is possible to see a very minor loss in fuel economy, but you will see a great improvement in throttle resolution and smoothness.

Full how-to instructions (below) and all necessary hardware is included. Easy to install in about an hour. No core charge so there is no need to return your old valve. This part only fits the Gen 1 2002-2006/7 Cooper S with the W11 Tritech motor.

Instructions Download



74 Reviews

  • 5
    Do bpv

    Posted by Manuel gomez on 25th Mar 2021

    It's an awesome product I got one for my 03 r53 and my wife's r52 a d it's like magic

  • 5
    Bypass valve

    Posted by Trinity nemeth on 22nd Mar 2021

    Did exactly what it was supposed to with a super easy install! I had a bad yo-yo happening (weak/damaged spring in bypass valve) this eliminated that! Plus getting 2 more psi of boost on top end now aswell

  • 5
    Great replacement part.

    Posted by D Geriner on 15th Mar 2021

    I was not going to switch out the original by-pass but I am glad I did. This new one closes very tightly keeping air flow where it should be. IT'S WORTH the money.

  • 5
    I didn't even know about this device before!

    Posted by Paul on 23rd Jan 2021

    I only found out about this valve while researching after my original supercharger failed at 158k miles. I figured I should replace this while I'm there. Wow! Throttle response is now fantastic! Very high quality product!

  • 5
    Bypass valve

    Posted by Mason on 27th Nov 2020

    It's amazing makes a huge performance difference. Still has a little yoyo but gets into boost much sooner.

  • 5
    Bypass Valve

    Posted by Carlos on 5th Nov 2020

    Really felt the difference after installed, you can hear the supercharger wine sooner then before

  • 5
    Detroit Tuned Bypass Valve

    Posted by Jarred on 1st Nov 2020

    Great product. Livens up throttle response and adds a nice sound. Would recommend if you have the yo-yo effect or if your old bypass valve is a little worn due to age.

  • 5
    Great part

    Posted by Brent on 6th Aug 2020

    Car instantly felt a ton better after the install. I did the 2% pulley few days later helped even more.

  • 5
    Small upgrade, big difference

    Posted by Joel Sanchez on 2nd Aug 2020

    It's been a long time coming, but I finally bought my first R53. I can tell you that all the hype about them is spot on. I love how nimbble they are. Look, I can go on and on on my Mini, but I want to review this product.

    My mods list is very short, but have all been to improve the engine performance and feel. I was looking for something that would help the horrible RPM drop between shifts and yo yo effect. I was going to go for a tune, but I'm holding off until I have a better built motor in hand.

    So in looking through the site I found this bypass valve and from the description, it seemed to address the issue I was having. After some consideration, I said "Why not?" , and proceeded to order the valve. It arrived today and I immediately (inner child moment), went right to work on the install.

    The directions provided were great and I would say it took me about 45 minutes to complete the job. Once completed, I reset the ECU as instructed and I was ready to turn it over. I anxieiously turn the key and my dude comes to life. To the ear, it sounded normal, but when I pressed down on that pedal, oh man! The response is definitely the first improvement to this upgrade. I let it warm up and idle and to my surprise. It stayed stable as usual, no high or low idle. Ok, car warmed up, nice night and a highway near by.

    My first on the road impression is that I needed to adjust my shifting habits. My normal driving shift points were about 2500 to 3000 RPM. This new bypass valve move me up to 2900 to 3500. Once its a full boost its ready to go. I jumped on the highway and that's was were i knew I had made the right choice.

    Sometimes its not always the big parts that make the difference. These smaller, usually forgotten parts can make just as much if not more of an improvement over more costly ones.

  • 5
    bypass valve

    Posted by Aaron on 21st Jul 2020

    Holding this next to a stock valve, there is no comparison. The Detroit Tuned valve is worth the money.

  • 5
    tuned bypass

    Posted by wim's toys on 9th Jul 2020

    I bought two of these for two r53 mini cooper s's. they shipped quick, have nice instructions and install in about 30 min if you know what your doing and have long fingers and narrow hands. the felt impovement is very noticeable. a must have on any! plus the people that run the show are helpful and friendly.

  • 5
    Detroit tuned bypass valve

    Posted by Scottie2timez on 4th Jul 2020

    Shipped fast,some free goodies, def improved the spring,my old valve was stock 115k miles,and easily no spring resistance, Detroit even seated the butterfly valve correctly and no visible light =no boost lost. 1000 % recommend if you have not switched, and 1000% happy with performance again, I just want to go fast