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I'm running BM3 Stage 1 and also have a JB4. Stock hardware other than M air filters. I often run with just the flash with the JB4 on map zero, or I'll run E30 and run the JB4 on map 1 which is about the equivalent of BM3 Stage 2. I prefer the driveability of flash only as it's much smoother than the JB4 and I can leave the MAF sensors plugged in. My question, is anyone running the BM3 Stage 2 flash with stock hardware? If so, what fuel? I may give it a try. BM3 says you need catless downpipes for their Stage 2 flash, but that doesn't seem right considering our downpipes aren't really a restriction.
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