No they are not the same. 98-99s use the same piping and the 00s use their own unique piping. Reason is the exhaust manifolds are different from 98-99s and 00s. The pipe connects at a different position on the 00 exhaust manifold. The electric operated valve that bolts to the piping is the same on 98-00s.
2000 Arctic White SS, A4 - 12.791/106.14, 1.837/60'
1999 Hugger Orange SS, A4 - 12.079/112.85, 1.681/60'
1972 Camaro SS
1971 Camaro SS
2004 Silverado ECSB