Sorry E, impressive as the numbers are, the sound at those 'low' stroker revs is not going to get my attention. You need to at least fit that unit in a MKIV with a set of 180° crossovers to make some real noise-- some would refer to it as more refined.
. Im sure Fran @ RCR would be only to keen to help you out with the car
--- no I'm not an agent for him, in fact he would probably want to kick my butt ahead of anyone else!!
However we are getting a bit sidetracked here- better leave these guys to it!