HMMM. Time for next mod

Hot Shot

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2007 MazdaSpeed3
I'm thinking either a Forge BPV or Corksport test pipe. Both are about the same price. I think I'd rather wait and get my entire exhaust at the same time, so I might go with the Forge valve now. Some have mentioned that they see a slight boost pressure increase with a BPV. Any truth to that?

James
 
Yes that is true. the Stock DV tends to open a bit early due to its weak spring.

I would recommend the diverter valve upgrade, or maybe an intake to get started.

Personally, I don't find the full catback exhaust worth it. Instead, i would just do the downpipe and midpipe.
 
Yes that is true. the Stock DV tends to open a bit early due to its weak spring.

I would recommend the diverter valve upgrade, or maybe an intake to get started.

Personally, I don't find the full catback exhaust worth it. Instead, i would just do the downpipe and midpipe.

Forgot to mention I already have the MS CAI and Prosport boost gauge.
 

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