Cut out the baffles on the underside of the air filter box to match the
size of the air filter. Remove the baffles in the lid with a Dremel.
Throw in a K&N (no affect on MAF sensor, had one for 2 years). Go to Home
Depot or Lowes and pick up some washers with a 1/4 hole and put 3 of them
underneath the two inside bolts holding the air box to the engine bay,
raising the airbox will allow more air in through all that aurface area
you created with the above cuts. You could buy a Whisper lid for about
$100 instead of working the Dremel on the lid, but in either case you
should still cut the bottom of the box. 2000&up have also shown some
slight improvement from removing the MAF screen on the throttle body. Use
a paper clip or couple toothpicks to remove the retaining ring and then
gently pry it out. Thats about it for the free stuff. Definitely a
noticeable SOTP difference.
Next thing is SLP Cold Air Intake (slponline.com) or Fast Toys Ram Air
(fasttoys.net) for about $180-200.
Then dump some money into an exhaust, get a high flow cat converter from
Carsound, or Catco (summitracing.com) and a full 3" cat back. I used a U-
pipe from Jegs cut in half and rewelded for the S-pipe after the cat.
Muffler depends on your choice of sound, most have flowmaster, I have
Some other little things include a 160 degree thermostat and manual fan
switch to keep the engine cool. Dynos show about 17hp loss when running
at 195 degrees compared to 170. Change the plugs to NGK iridium and put
on some 8mm wires Taylor or MSD. This will smooth out the tourque curve,
like the 3" exhaust, you aren't losing tourque like some say they feel,
its just a smoother curve.
Get a limited slip differential if you dont have one already.
When at the track, take out the back seat, passenger seat, spare tire and
jack, pull off the whole air box assembly and run open throttle body,
with the above mods, and this, you should see low 15 or high 14s
depending on your driving.
After that you have a good basis for nitrous or turbo or a cam swap. Comp
cams makes some cams for our cars and they also custom grind.