What Size piping for custom Y for rear mount
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What Size piping for custom Y for rear mount
well im going to buy piping tomorrow for my intercooler piping and exhaust, im ganna take the stock y pipe off and make a new one with no cats and pancake driverside pipe but i was wondering should i make the new y pipe out of 3inch piping or 2 1/2 piping its a rear mount turbo kit thats going on the car.. thanks