i bought a 2007 SI a few weeks ago, and am now in the works now of purchasing these items...please help me figure out which ones would be best, i've done a ton of research on all and am stuck between choices:

DC sport or buddy club race header
skunk2 (Mega Power R Version, 70mm piping) or buddy club cat back
2.5" magnaflow spun metal cat. (only for buddy club race header)
AEM CAI

what else can i do to make this thing better performance wise without messing with internals like adding a turbo? thanks all for your help.

 

budget?

 

4,000 give or take.

 

just wait for a RedShift supercharger kit
http://www.redshiftmotorsports.com/S...101&Click=1641

 

for $4k s/c'd would be schweet and u wont have to mess with internals running on low boost. just need reflash and good tune.

 

yea but wont a supercharger void my warrenty. and i would still need to also put on the cat back, header, CAI.

 

are they gonna make a stage 4 for the SI. i saw it up there for like 5400?

now let me also ask you this. long term, which one is better? and which one will allow me to build up on more in the future. i am trying to get atleast 400hp out of this car. i dont want to do an engine swap either. i am looking for either turbo or supercharger. which one you think i should save up for and buy. i know with the turbo i dont even need the header i am looking into buying, but could i keep the header if i bought the supercharger, and would it make it faster? thanks for the help guys.

 

you're never going to get to 400whp without voiding your warranty... turbo or supercharger would be the only way to go.

if I had 4 grand to spend I wouldn't mess around with trying to make it quick N/A.

 

hahahaha

is 4 grand too little for trying to make a quick N/A? or does it just allow for forced induction options too?

 

Because you can make it faster via FI than NA if you have the cash.


If I were in your shoes, what I'd probably do, is wait out the warranty and save some cash for the supercharger kit. In the meantime, get a good exhaust, suspension, good tires. That would make it plenty of fun to drive for a while. Then when I was ready I'd buy the supercharger kit. But that's just me; I'm interested in autocross and road racing, where it's nice to have a torque "curve" that looks like this:
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