I have a turbo..not sure what brand or size it is..anybody with any info? it says Roto-Master on clamp...also has a( 25 4P7 ).....and serial# 195469 and 7PA262...on housing the case was sanded and polished so most numbers are gone..any help would be appreciated..I was told it came off large 800C.I. turbo diesel generator,,was wondering performance use...