are there any equal length manifolds for the d-series? other than that SSautochrome piece of shit, i don't think so....
i wouldn't waste your money on it. the equal length design really won't give you a gain for your dollar on the d-seires.... 400+ whp is where it starts to make a difference. look into a good log-style... inline pro, etc...
as for will the t3/t4 be too big? which t3/t4?
a t3/t04b .43 .57 would be fine
a t3/t04s .80 1.15 would be stupid