Looking to build a custom 4 or 5" aluminium cold air, or possibly plastic. Question is what website can I find these parts on?

 

siliconeintakes.com

 

^^ That's where I got all my couplers and t-clamps from

 

X2 on siliconeintakes.

 

Or you can just buy the cheapo eBay CAI kit for something like $50. I did and it works well. Has to modify it a tad to get it to fit, some of the bolt holes didn't line up on the filter shield.

 

For the piping it self I used some stuff I found at the local hardware store. 4" ID and pretty thin wall so the couplers would fit over it.

Was going to paint it black but never did.. and well now it's supercharged so no use for it.

Actually should sell it...

 

I got some 4" exhaust pipe, some rubber couplings from a semi shop and some clamps from canadian tire.
it was cheap and works well. still have to paint it

 

i lucked out with a used piece of 4 inch aluminum tube from a spectre intake a buddy gave me. i was gonna use a 4 inch piece of exhaust tubing even though it was heavy. the thin pvc 4 inch sounds good. the couplers i got on ebay in blue. got an airaid filter almost like new with adapter for sale for $75.

 

Airraid sells a kit that you can build what you want