I was just looking around at mine the other day and I think mine was .48 a/r, I can't remember for sure. I can take a look tomorrow.
hey that's not an exhaust housing.... really the intake a/r is pretty irrelevant. torkme was quoting the exhaust a/r which is an indicator of how fast it spools. you really just look at a pressure map of an intake when choosing a turbo but the exhaust you tune with different a/r housings. it's area/radius. the radius doesn't change much if the turbine is the same so that ratio is an indicator of area and nozzle and exhaust velocity.here is whats in mine