ok so i about to do my 1st i/e/h on my 07 si. this is what i geting.

Injen Cold Air Intake for 06 Civic SI - $250
Comptech Shorty Headder 06+ SI - $530
AJP 3" Cat-Back Exhaust 06 Civic - $600.
Then reflashing.

Geting it all from www.ajperformance.com.

this is my 1st time so i dont now much about brands and crap. any feed back would help. placing the order one the 1st when i get payed.[/align]

 

Ebay Intake + AEM DryFlow Filter: $80
Magnaflow Resonator + Magnaflow Muffler + Custom 2.25" Piping: $275 (maybe less, maybe more)

And header, try Megan, they are a bit cheaper and from what i hear okay quality. Idk if they make one for an 06, but you could try.

 

DAMN! $1000+ for I/H/E is NOT worth it...

 

look for deals, even slightly used stuff.

im looking for a muffler right now, but got an intake and header for around $220 in all.

 

IMO it is worth is on a K20. Get hondata after this stuff and you will be well over 200whp if you get it tuned.

 

my friend boosted his si for roughly $2900.... the above is almost half of that

 

I agree with Flip.

 

well i do have and 07 si. and parts are not cheap. boost runs $4000+ and i keeping it n/a anyways.
i am Big! on "you get what you pay for" so i want a good brands and not to keen on used stuff.Will take a look on ebay.

so now my list has changed.
1.Injen Cold Air Intake
2. Dc headders.
3. Exhaust-this is a hard one. 2.25" 2.5" are 3"..everyone telling me something diff.
i looking into turbo mafia exhaust.

 

1st 2 things are good. If you got some money to throw around go with Buddyclub header, they are abit morequality than dc. Dc had some problems with their stuff alittle ago but supposedly fixed it, I still am not trusting it. Exhaust, depends if you plan on turboing later. 3' if your turboing, 2.25 if you dont plan to (or supercharge it). Xmas im going with Magnaflow, it is a 2.25 so you probly wont get pulled over as much because it looks relatively stock and isnt annoying. Although the intake...they are working on carbon fiber ones like they have in the ep3's that has a proven 18.1 hp gain. Pretty impressive stuff, the intakes are huge. Id probly wait until they come out with one for our car

 

Iplaceing my order on the 1st.

1.Injen Cold Air Intake
2.Buddyclub header - damn things are not cheap!
3.Skunk2 Megapower R 70mm cat-back- guy wonts 400 for it and it has 8k miles.