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- 09 mazdaspeed 3
all you need to know is the stock bpv is plastic. haha that alone made me change, you do notice a difference between stock and aftermarket valves. i'd say HKS in recirc is damn quiet. i like it. i ran it in VTA for bit when i had the hose kinking problem but nothing the front mount didnt fix 
I'd like to try a different valve set up tho just for s**** an gigs. i like the whoosh sound, i think i'd like it to be a little louder but i think thats just the ricer in me.

I'd like to try a different valve set up tho just for s**** an gigs. i like the whoosh sound, i think i'd like it to be a little louder but i think thats just the ricer in me.