Before you go asking questions about turbocharging, make sure you read all the info. in this thread.

First off, if you don't know what a turbocharger is, go here http://www.howstuffworks.com. Second, you need to understand that a turbo will put additional stress on your engine. Now, here's a list of turbo kits available for the I4:
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Real-Engineering Turbo kit :

280HP REAL ENGINEERING TURBO KIT

R.E.A.L. ECU

TIGERLILY 8.5:1 cast aluminum low compression pistons
(Optional) 8.5:1 forged low compression pistons

Garrett T028 turbine internal wastegate
(Optional) T3 TURBO X 350hp turbine AUSTRALIA

Cast steel turbo exhaust manifold
(Optional) stainless turbo exhaust manifold

BOSCH 330cc injectors
(Optional) BOSCH 550cc injectors

AXIS 2.25" mandrel bent aluminum intercooler pipe kit
AXIS stainless steel down pipe with flex
AXIS 500hp oversize intercooler from Australia
AXIS fuel rails
AXIS radiator water reservior tank
AXIS oil line
Innovative Turbo silicone hoses
Innovative Turbo reducer coupler
connectors
gaskests

$3,900 (280hp) List price.

(Optional Package) $5,900 for 450hp.

http://www.real-engineering.com/prod_turbo.php
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Alpine Developments Turbo kit :

I can't find a list of what's included, but it increases whp by about 66. Price is $2950.00
http://shop.hyundaiperformance.com/shop/item.php?i=ALP_BETA-TIC
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As you can see, the RE kits are the most powerful, but are expensive. The Alpine kit might be the better choice for someone on a smaller budget. These two sites also sell turbokits, however the kits are made for the budgets & horsepower goals of the individual. Meaning, that they're made when you order them, so you won't find any kits or prices on their sites. You'll have to contact them to get a kit.

http://www.kspec.com
http://www.speed-factor.com

Good info. :1:

yeah! a noob who can contribute!
madd props good post!

Thanks...I think :p