Use Dynomax polished stainless Ultra Flow #17283 for the resonators in front of the differential. Center/Center, straight through & no restriction, 14" long bodies - they will fit. You gotta decide on what you want to use at the rear. The old Walker Cuda mufflers used to sound great, but they were discontinued long ago. Dynomax has no 2.5" in/out round ones now in the Super Turbos.