Easy way to check ur exhaust, just feel how much is coming out of the tailpipe. If it's plugged you will barely feel any exhaust coming from them. If you're not sure about how it should feel check another vehicle. Should be pretty noticable, at least mine was when it clogged.
teksid block with forged internals, MHS stage 2 heads and cams, 80 mm 03 Mustang MAF, Bullitt intake with Accufab oval throttle body, Kooks headers, 2.5 inch catless true dual exhaust, w/x pipe and Magnaflow Magnapacks, Dirty Dog 3000 stall marauder tq converter, BC automotive built 4R70w transmission ,MMX Dynotech Drive shaft, Trac loc differential with 3.73's, custom made fssb, and lecb, rear shock tower brace by Azzkickers, JL subframe connectors, Eibach 1.5" lowering springs, koni shocks, dyno tune by Tim Barth at Mr Norm's garage