I own a 2006 WRX and I had a 100% atmospheric Blitz Super Sound BOV for about a month, when I first bought upgrades for my car. I bought it because I would hear it in movies, and on a EVO in town and I thought they sounded nice, and from what I heard they helped performance.
I kept the Blitz on for less than 1,000 miles. It's sitting in my garage in a ziploc bag.
During that time it backfired on almost every accelerate and let off. When I would accelerate hard and get up to 4,000ish at and let off completely the
entire car would shutter like it sucked up a rabbit. I was running the orig. Stage 1 from COBB at the time.
When I would head down a windy country road, which I used to love racing down, the car would stumble after repeated release and application of acceleration throughout the twisties.
I took it off, changed the sparkplugs, ported all the piping I could get my hands on including the connections on my stock BOV. Installed the p&p'd stocker, reset the ecu, ran a new map that I tweaked, did the knock timer reset. It works great.
The stock sounds better than my Blitz! I'm running a Fujita F5 Comp Intake and it's quiet enough on hard accel that people can't hear it, but if I cruise up to a parking lot and do some minor let offs, it sounds like no other BOV on the market. F the wooshing sound give me the laser like sound of the stocker
Check the page in the sig for the video. The beginning has the hard acceleration, and later on a slow drive by. Stocker the whole time.
I love my car now.:thumbup: