Not at all I tried a cheap £30 job for about 3 weeks before getting the baileys made no difference apart from the noise. I then swapped it to the blobeye again no problem so got another bailey for that. It's like a lot of things with Subaru especially the Impreza it has a few more snobbish owners. Like if you have graphics on your car or a body kit if it's STI or WRX yep even that has now come a pick on people point. Never known anything like it in almost 10 years :( Dump valves are the same and possibly was one of the first things the Subaru community liked to pick fault with. So lot's of people will say don't put one on it makes the car run bad, it does this it does that. IMHO 90% Bullshit 10% truth
It's like Bandit on here had a problem car wasn't running right. I asked him if he had a DV on the car he said he did and not long fitted it HKS SSQV one, I told him to take it off put the stock back on and see how it goes. Came up to me last year at Japfest and thanked me said once he had swapped it over was running great again, he was gutted he couldn't have one on the car but it's just the way it goes with the car. had the baileys on the bug about 3 years now I think and about same with the blobeye still run just as well. other than a tisssh type noise when changing but it's not overly loud to me unless giving it some, more flutters at lower revs. And I'm not rich enough to have a car that I can have to turbo flutter so closest I can get so the dump valve stays. To be fair I'm starting to like doing things to my car that the snobbish people disagree with I've even been tempted to put WRC stickers on again :D Just because I can lol. But anyway for me the HKS is by far the best sounding just a lot more than the baileys for the same results really was my final decision to which one I got.