Link for rockers?

what does a thermostat do and which one should i get?

Aftermarket spark plug cables? any difference?
?
PCM Upgraded? I live by zzp but what all can a upgrade do and for how much?

Cold Air Intake? JBM? WIZAIR? K & N?

Best advice for staying NA

and also what do i need to get to make it turbo/ supercharged if i do decide to change

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If you want to go turbo in the future- forget about the intake & PCM. Just get a HV3, voltage booster, Alt-rewires, fuel pump thing too, PRJ ignition wires, and get some royal purple in the car. Save up for the turbo. I don't know about what rockers you should get, I've been thinking of getting some myself - but I don't know if which rockers I should get that would go great with the turbo too.

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Why have more money than brains? Cuz RACE CAR :

These will net you some nice gains and still stay NA. Intake, exhaust, ER rockers, HV3, PLOG, DP, ubend delete, PCM and a high velocity throttle body. You can always cam the car. If you want to supercharge it, search for the top swap. Its very common for those with the L36.

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1999 GT|SLP CAI|Borla Catback| Shift kit|18" Koblenz|GMPP Lowering|GMPP handling|Blk Headlights|ER Rcokers|HV3|HV TB http://www.fquick.com/The_Guz

If you are going to turbo or supercharge it eventually. Start off with...

Stainless Plog
3" Downpipe
HV3
1.9 Rockers
180 Tstat
Al 605's/NGK TR55's gapped at .58
PRJ or ZZP wires(stock are just fine too)

A tune from zzp will really wake your car up, if you have someone around you with a tuner, they can do a lot more though.

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What are rockers? i have no idea what these or where they would go
where does the hv3 go and what does it do?

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Here is some info on the rockers and the HV3. The HV3 replaces the stock runners on the upper intake manifold.

ER Rockers
http://www.zzperformance.com/grand_prix ... &catid=104
HV3
http://www.zzperformance.com/grand_prix ... &catid=113

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1999 GT|SLP CAI|Borla Catback| Shift kit|18" Koblenz|GMPP Lowering|GMPP handling|Blk Headlights|ER Rcokers|HV3|HV TB http://www.fquick.com/The_Guz

Ok so here are the upgrades i have planned for over the next year:
Custom Engine Cover
Catback
ZZP Downpipe
Custom Cold Air Intake
Possibly: HV3

Tell me what you think about that. There will be more in the future just these because i'm kinda lacking
in the mula department.

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dont let the hv3 scare you. to my understanding you take off the upper intake manifold, replace the stock one with the hv3 and put it back together. you can change out the lower intake gaskets at this time too, which commonly go bad. its not nearly as hard as it looks or sound, just take your time and remember what bolts go where.

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'05 WRX STi - COBB Stage 2|Invidia DP|3" Borla XR-1|Coilovers|Camber Plates|Swaybars|Endlinks|Bushings|Braces|Anti Lift Kit|DBA4000s|SS lines|
Sold: 06 Cobalt SS/SC, 99 GTP 245WHP/326 Ft-lbs, 06 R6

i've done 3 of em... takes about 30 min to do..

enless u dont have the right parts