Nope. The Accurate HP exhaust has a 2 1/2" y-pipe outlet and a 2 1/2" intermediate pipe with a 2 1/4" over axle pipe. The 2 barrel system has 2" pipes at best. In the 66 Dodge parts catalog, the 2 barrel muffler is #2460-823 and has a 2" inlet with a 1 7/8" outlet. The "Power Pack" muffler #2660-541 has a 2 1/4" inlet and outlet. The Y pipes are different part numbers also. tmm
