If I remember right "pipe" and "tubing" are measured differently.
Pipe is measured on the ID...and tubing is measured on the OD. Hence your 2.5" exhaust tubing has an outside diameter of 2.5". When you say Mopar is really selling you a 2 3/8" system that is not really correct, because the "OD" is 2.5" just like they say it is. If you measure your stock GT exhaust system you'll find it measures 2.25" OD so you really are jumping up a quarter inch in diameter.
Deen
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GT, 5-Spd, K&N filter, Stage I, AGP 3147 Big Turbo, DTEC Fuel Kit, Tial WGA, Greddy Profec EBC, DCR 55mm TB, 05 Plastic Manifold, 180 Deg. Stat, CCA FMIC, AMX hard-pipes, Water-Injection, STS shifter, Needswings 3\" DP w/dump and Borla Cat-back, BG Drop Springs, Eibach Sway Bars, Panther alloys & Eagle F1 Max-Performance Tires. Best run to date...12.93 @113.45MPH.
77 Blown Vette-runs 10\'s @ 136 MPH.
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