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I am certain that mine was 2.5" through the cats, then was reduced to 2.25" between the cats and muffler. Then it was a single 2.75" exit out of the muffler.
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Mine: 2007 Tundra Double Cab, 5.7L, slate, 2x4, Flowmaster 50 series dual in/dual out, Homemade leveling kit (2.5")
Hers: 2007 Tundra Double Cab, TRD 2x4, 4.7L, desert sand
Previous Vehicles:
1990 Jeep Wrangler Islander, Rancho Lift
1992 Chevrolet Silverado Z71 4x4 RCSB - 190,000 miles and still running strong when I sold it.
2001 Honda Magna VF750C
2002 Chevrolet Tahoe Z71
2006 Chevrolet Trailblazer SS (8.9 sec 1/8 mile - STOCK)
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