hi i wanted to know if

1.I just get a svt upper im and t/b will there be much differance.

2.or will i have to get the lower as well to mate up with the upper im.

what kind of gains will i notice if any with 1 or 2 setup.

thanks cool

1998 SE atx
Svt exhaust
No rez
Svt rims
Cta intake
B.A.T handling kit
Door dings all gone
Sony 850x head unit,10 disc cd changer,2 12 JL
Marathon amp 600w
Painted brakes red
:o( dyno at 123hp/133tq(stock)
Mods in the mail