KILLERGS4

What is the least expensive upgrade I can get for my GS4 (performance wise, of course). Something realiable will be nice. I'm still a student, so money is a big issue!

bravo261

iTrader: (1)

look down the page in this forum, something about what to do with $5000, there are some good suggestions. exhaust and intake to start i'd say

LexCiting

Remember you are driving a Lexus.

Anyway, best bang for buck
* is weak ***** us the best

$100 - $600 range

$100 new spark plugs (there are some good choices. Do a search on spark plugs) **
$100 K&N filter **
$575 SRT Cold Intake system & SRT Race ECU ***** (best buy, you maybe able to get one used too for around $400)

Hope this helps

bitkahuna

iTrader: (20)

I hear lots of stickers make your car faster - something about improving your aerodynamics.

KILLERGS4

How much increase in HP are we talking about here (Filter and Plugs)? What Plugs do you recommend!

bravo261

iTrader: (1)

many guys have raved about the torquemaster spark plugs from the group buy offered here recently. about $110 and it'll be worth a lot more in your mind, supposedly. i'm getting them for sure.

lexciting, great suggestion about the plugs

KILLERGS4

How much HP increase? This is my main concern.

RacingAristo

The questions you asked are totally n00b and asked many times before. Search it before asking a question. There is dyno on the TM plug.

LexFather

For $120, the L-tuned ECU that you can install yourself. And please use search!

bravo261

iTrader: (1)

so true, but he is only looking for the glory and power mods for now