How do you make a SRI?

BADFISH6

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2007 Mazdaspeed6 Metallic Grey
Ive seen a couple people with SRI s they made them selfs. Can someone with one of these give me an exact list of parts they used? thanks
 
whats the proper sized MAF? i'm making a DIY MAF out of 3 inch aluminum piping. would that be okay? it'll be a replica of AUTOexe except no one can tell me what the diameter of the MAF is.
 
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