[Tqlla]

Hey, I have been doing some late night research on which mufflers to buy for my 3000GT(with 192K miles, and dying VR-4 exhaust)... and I have found that people dont actually say anything about which muffler was purchased, spec or model number wise. IE most people will say... purchased a magnaflow, or a flowmaster(though I have see the 40 series mentioned often)

Anyway, what size should I get? My tubing is 3"

So I am thinking about buying this and putting it where a driveshaft would be, then piping to tips
Magnaflow 3" inlet, dual 2.25 output.
5x8x18

Should I go with single in and single out... then y split?

Any thoughts? how does size affect sound? I want it Quiet as possible.