the BCs will give you the best adjustment IMO. thats for any M35.
also for cost and comfort and adjustablity and build quality. they win on all of those items
that turbo whine you were hearing is awesome. LOVE the sound of the turbine when you have an exhaust leak
my bosses car has a dump straight to the ground from the turbo, i love driving it just to hear that sound. pity its attached to a mazda6 MPS
i own an m35 with 117k on the clock - probably more as the cluster HAD been removed at some stage before - and its still going
also have another one with 105k on the clock and its also running fine.
if you look after it, it will keep going.
Just spotted a middle aged lady and child drive away in a Pale blue m35 RX four at the caltex on Epping road north ryde. Also saw the same car down the road from my place earlier. New m35 in the area?