RYANSTAR Adjustable Turbo Dump Blow Off wastegate Valve BOV 25mm Aluminum Black Universal Fit

I ordered two to try out on my BMW N54 in place of stock diverted valves after buying a vrsf charge pipe instead of going with a blow off valve and paying 6 times the price for a name brand and so far they hold 18.5 lbs I’d boost no problem jb4 with mhd back end flash , catless dp , bmw dual cone intakes and a couple more bolt ons that are not relevant to the performance of these . I have them vented to atmosphere and they sound great with just a strong deep swishhhh on release . The important part for the money they are holding up to the boost I’m putting out and I bought these on referral from a friend same engine and turbos putting out 25 psi but that’s is as far as I know what they will hold .

I really wanted to like these and they held up for maybe 1 day of daily driving. Upon driving the second day of installation I noticed my shifting was off and power felt diminished. I was planning to hook these up to a catch can since blow-by was shooting oil into my engine bay since I was running a vent to atmosphere configuration. This is normal since the 335i's from the factory have a ton of blowby. I have a catch can installed already however the blowby from the charge pipe was enough to thinly coat my outer charge pipe. Upon inspection I noticed one of the BOV's O-Ring was completely snapped. I compared it to the other BOV and sure enough, the o-ring that's stock on these are super thin and will definitely not hold up over time. I drive an 09 E93 FBO on stage 1+ at 14psi and sadly these did not hold up in daily driving. I track my car every other season and I'm really sad these did not hold up. If you're looking for cheap BOV setup avoid this at all costs. Bite the bullet and go for a tial+charge pipe setup or stick to oem DVs. I'll be emailing the manufacturere about replacements or a refund since I really liked the sound. I will update this review with what they say or if I don't get a response at all.

Replaced my stock diverter valves with these and the work just fine. Have about 150 miles on them. 2008 335xi

Spring is too strong.When at its softest, doesn't close the valve properly.When at a harder setting, the valve closes, but won't open under vacuum... making me chase my tail.There are 2 o-rings, the one at the bottom-most of the piston is too tight around the piston, it snagging the piston. Hard to open, then to close.Not a happy customer.

Installed this on my 2021 rzr turbo 1000s4, vacuum sounds cool but It makes no bov sound. It’s vented to atmosphere and still nothing...

Tho O-ring in the valve will not stay in place, which is allowing the boost to leak. O-ring gets caught inside the valve and does not allow proper operation!

good price same quality as the ones at 5 times the price

Neither of the blowoff work