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Does anybody off hand know about exhaust laws in Georgia and Pennsylvania? I'm living in Ga. right now but will be moving to Pa. by years end. I'm considering doing the straight pipe but of course don't want to screw myself come inspection time.
OK, but don't you think it's strange that they aren't available if they will give some performance gain? I would think some aftermarket company would be mass producing them if that was the case. Would the turbo spin too fast?
Well that's just it, I don't think that it would be economically feasable. The hot rod PSD market segment is just too small for the big time header companies to bother with, so that leaves the (relatively) small diesel tuner shops trying to mass produce what would essentially be a one off custom. Sure it's doable, and somebody probably will eventually, but I'd bet they will be prohibitively expensive for most of us regular working class stiffs.
As far as overspeeding the turbo....dunno. I would guess most likely not since they aren't adding any more fuel, just squeezing that last little bit out for the guy (or gal) that has everything.