Complete Flowmaster Exhaust SystemsComplete Flowmaster exhaust systems are available from Virginia Classic Mustang for classic and late-model Mustangs. If you're doing a classic, there are four basic systems designed to fit: two for '65-'66 and two for '67-'70. All are from the transmission crossmember back. If you have a convertible, you're out of luck because these systems are designed for hardtops and fastbacks only. Late-model systems (not covered here) are from the catalytic converters back (known as "cat-back" or "after-cat") with the H-pipe, mufflers, tailpipes, and all attachment hardware.