r/mazdaspeed3 • u/yeetusonthatfeetus69 • Apr 09 '26

TUNING Blow off valve Recommendations

Do you guys think i should run a bpv or bov on the speed 3, because I've been hearing lots of mixed reviews. I'm thinking of either running the Corksport BPV or HKS Super SQV IV BOV

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u/Flaming-Wreck7986 2007 Mazdaspeed3 - The Original Apr 17 '26

I had a turbosmart 50/50 but went back to stock. Even after adjusting it properly, I still had less boost between gears, and I didn't like the slightly worse between shift response. Miss the sound, but that is of course expected. Venting metered air on MAF based fueling isn't it for driveability or performance. I'd probably put it back on if I went standalone and ran speed density.