this is what i have seen at my job on intake mods
on dynojet
steeda 03 gt 11.5 rwhp afr 13.3
01 gt bbk fenderwell 6.8 rwhp
bbk 70 throttle body 3.8 rwhp afr 12.9
this was results on my 04gt
mac 16.2 rwhp straight shot air system only
20.4 rwhp 85mm mass air system then added mac75mm t/body and mac plenum
total intake mods 26.9 rwhp on same dynojet afr 13.1 hope this helps only my 2nd post new to this
on dynojet
steeda 03 gt 11.5 rwhp afr 13.3
01 gt bbk fenderwell 6.8 rwhp
bbk 70 throttle body 3.8 rwhp afr 12.9
this was results on my 04gt
mac 16.2 rwhp straight shot air system only
20.4 rwhp 85mm mass air system then added mac75mm t/body and mac plenum
total intake mods 26.9 rwhp on same dynojet afr 13.1 hope this helps only my 2nd post new to this