Review on RYANSTAR Adjustable Turbo Dump Blow Off Wastegate Valve BOV 25mm – Universal Fit in Sleek Black Aluminum Design by Kevin Gunnmann

I really wanted to like them and they lasted maybe 1 day of daily driving. On the second day of installation I noticed that my circuit was off and the power was reduced. I was planning on hooking it up to a trap as the exhaust was throwing oil into my engine bay since I was using a vented to atmosphere configuration. This is normal as the 335i has a lot of blow-by from the factory. I already have a siphon installed, but the blow-by gas from the pressure pipe was enough to thinly coat my outer standpipe. Upon inspection, I noticed that one of the BOV o-rings was completely broken. I've compared it to another BOV and in fact the o-ring they have is very flimsy and definitely won't hold up over time. I run 09 E93 FBO in stage 1+ at 14psi and unfortunately they don't hold up to daily driving. I track my car every other season and I'm sorry they didn't last long. If you are looking for a cheap BOV setup, avoid this at all costs. Bite the bullet and choose a Cyal + load tube setup or stick with OEM DV. I will email the manufacturer for a replacement or refund as I really liked the sound. I will update this review with what they say or if I get no response at all.