Detroit Tuned Bypass Valve

Detroit Tuned Bypass Valve

(67 reviews) Write a Review
4.00 LBS
Calculated at Checkout

We have been building the DT BPV since 2004 and have not had any price increases. Slowly the last 2 years MINI has been raising parts costs and we have been absorbing them to the point we had to raise the price now to keep producing them as well as our resellers make their fair cut. We always try to keep our prices low, we hope you understand.

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 your 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 Tritech motor.

Instructions Download


67 Reviews

  • 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

  • 5
    DT bypass valve

    Posted by Jay on 23rd Jun 2020

    Your product was way better than I expected and your service and shipping was outstanding Thank You

  • 5
    DT Bypass Valve

    Posted by Justin Z on 9th Jun 2020

    I love this part by Detroit Tuned. Car boosts so much harder with this valve installed. Definitely a great update if you're looking to get all the power you possibly can out of your r53. Detroit Tuned is very professional and I look forward to doing more business with this fantastic American company.

  • 5
    Detroit tuned bypass valve

    Posted by Jim on 3rd May 2020

    Part arrived quickly and was an easy install, made a difference and car pulls hard now with immediate boost

  • 5
    R53 Boost Bypass Valve

    Posted by Joe McGlohen on 11th Apr 2020

    Excellent product. Exceeded my expectations on the Butterfly fit and return spring. Thank You!

  • 5
    R53 Boost Bypass Valve

    Posted by Joe McGlohen on 10th Apr 2020

    Quality exceeded my expectations. The butterfly seal was absolute, and the stronger return spring is amazing. I hope to try it out tomorrow!

  • 5
    Bypass valve

    Posted by on 2nd Jan 2020

    so much better than stock, at over 100k miles this is a must! construction and function are just as described!

  • 5
    Bypass valve

    Posted by Mike Stalling on 3rd Dec 2019

    I have a 16% pulley and my boost gauge showed max 10psi boost. Pulled the original bypass valve and I could see light all around the opening and the spring was weak. Installed the DT bypass valve and I now have almost instant boost and it maxes at 15 - 16psi. It made a huge difference. I definitely recommend.