Greddy Radiator Cap-- affordable mod to help contain high temps ($15)
Mugen T-stat-- A must have for reducing high engine temp ($60)
Mugen Fan Switch-- A must have for reducing high engine temp ($35)
Stock Intake -- remove the resonator,put a K&N air filter($25) in there.
stock exhaust-- agian remove both the pre-muff + and resonator($55)
(screw aftermarket exhaust)
Unichip--$600( you also get a free V6P grounding kit with this) !!
Sorry That is a waste...
N/A Mods that will actually get you a lil more extra hp/tq IS:
Comptech TRANS COOLER
UR pullies, altenator, AC, and Crank pullies (really all you need is the crank)
CAI- they are extrememly cheap used, or get an ebay brand, they are all the same thing, metal tube and cone filter.
Headers- I went with comptech (USED for 500.00), or go with stone, or alphaworks
Exhaust- That is your prefrence, no exhaust sounds bad for the J30's , I had magnaflows
Spark plugs, NGK Iriduim
This should be your last to N/A mods:
Tuned Apex-i VAFC- this will cost you 300 (Installed, tuned, and Vafc)
CL-S cams 300 bucks..
Then you should get into FI
Comptech SC
Either 6 speed swap or DR Evil Tranny..
AS far as unichip, for 600 bucks for only 10whp / 10 tq that is too expensive, my money is on the VAFC
Hope that helped