I don't think the resonator on the Bosal restricts the flow that much if any...you can look straight through it. Looks kind of like a glass pack to me. The rear two mufflers are between the size of a 1-3 liter soda container at the most. Haven't took the end off yet to see inside if they are straight through or not. The system has a little rasp when you first start it up but once the resonator warms up it is gone and sounds very nice. When I am done my mods I plan to get my car dynoed and will post the results. But still have a few to do before that. It will be the basic common mods so the only difference between mine and the majority of the modded SVT's will more then likely be the Bosal exhuast...so we shall see

This is all good stuff

Thanks,
Scott

Scott 2000 Contour SVT #1464 Mustang Dyno: 171.6hp/145.3lb Dynojet Dyno: 171.1hp/148.9lb 1989 20th Anniversary Turbo T/A "Indy 500 Pace Car" #1376 of 1550 All Original, 46k with a few mods 2002 F150 SuperCrew