[Ranger498]

depends what are your rwhp goals i belive its stated(not 100% sure) that over 650 or 750 rwhp a larger volume intake manifold helps .

there are a few god ones to go with
PHR
HPF
sound performance
veliside
WOTM

all good units all high quality.

 

[Ranger498]

dont know but i have read some negative things about adfx lately .best to check on them first.