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I know a lot of people out there run Dynojet's PCIII i had one on an old f4i and it seemed like it worked good.. i never really messed with it but the bike had a bit more power than my f4i i have now. I'm wondering if anyone has used the dobeck tfi system and if its any good for stunting? any input is great, I'm looking at overall cost. the PCIII on ebay runs about $275 whereas the dobek unit can be had for $140.