I think maybe @Charrlie_S got it right. I think maybe it was meant to be an N/A build from the rip and somehow a blower fell in their laps. I see no other explanation for cast pistons on a blown motor runnin 10psi. I mean THREE THOUSAND for a blower but wouldn't spend SIX HUNDRED on pistons? that tells me the blower was an afterthought. Even so, it's still cool.