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The American Thunder has a deeper exhaust note but there will be a lot of drone. I swapped mine out for the Borla S-Type and couldn't be happier. Not quite as deep as the Flowmaster but no drone at all. Much less noise in the cabin. Worth the price.
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Kooks 1-7/8" Long Tube Headers l Kooks Hi-Flow Cats l Kooks X-Pipe l Borla S-Type NPP Exhaust
Rotofab CAI l Mishimoto Catch Can l DSX Flex Fuel Sensor l 93/E85 Tune l GM Lowering Kit
Ported LT2 Intake Manifold l Ported 95mm LT5 TB l BMR Rear Cradle Lockout Kit
Halo Tunnel Brace l MRR 1LE Wheels l Goodyear SC3 1LE Tire Package l 480whp/467wtq
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