Clarks dual kit cor cars using 2 stock mufflers like a 140 works very well. On my rampy and Lakewood , I have his "quieter" FC dual mufflers on 140 pipes and 140 exhaust manifolds on 110 heads.All the FC's that I built motors for have this set up with home designed hangers. Next step would to have the heads reworked for 140 tubes... Regards, Tim Colson