Honestly bro, I would drop the SD, it seems like its going to be a nightmare.
Go with One charge pipe - maybe 4.5"-5" with the maf extenders. put a honeycomb before the mafs and call it a day. This would be the most cost and time effective route.
Remember, we know this works to some extent, my car idles better than the stillen kit, the response and drivability is a 100% better. Your shop could make that pipe in a few hours.
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