The reference to loss of vacuum in the above linked artilce would refer more to loss of vacuum due to cam changes and cams that have a lot of overlap. There should be no significant loss of vacuum by just putting a new exhaust or air intake on the car. I believe that that article was discussing NA engines more than compressor engines.
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 '03 Inferno Red GT, 5 speed, STAGE 1, Mopar BOV, Plastic Intake, Modified Upper and Lower Airbox, Custom Airbox-to-turbo pipe, Borla dual exhaust, Maddog Short Shifter, Drilled/Slotter Rotors, Ceramic Pads, chrome wheels, chrome door spears, AMP chrome fuel door, PT Cruiser 3rd light diffuser, H&R Springs, Rear Sway Bar added, MGW chrome door lock pulls, Blane's hood struts, Custom license plate mount, some interior dress up stuff...more to come
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