All ActivityMost RecentMost LikesSolutionsRe: What Chassis do I haveThanks Blackdiamond,I'll give them a call.Re: What Chassis do I haveAs far as needing a converter for a 2003, California law says if it came with a converter from the factory it must have one throughout the vehicles life.Re: What Chassis do I haveThanks for the responses. I was just told by the shop that my chassis is indeed an F53 chassis. Now here is the problem, none of his suppliers carry a California CARB certified converter for the F53 chassis. They only carry aftermarket converters for the E350 and F350 chassis. He contacted Ford and they claim they don't have them. The shop contacted the referee at the State Air Resources Board for a solution and they responded that they will get back to him in 15 days, what a pain.Re: What Chassis do I haveThanks Chuck, so between the choice of E350 and F350 converters, mine would be the F350? TonyWhat Chassis do I haveHi, I have a 2003 National SeaBreeze 1311 on a Ford Super Duty V10 Chassis. I recently had the catalytic converter stolen while the RV was in a commercial storage facility. The shop that is replacing the converter needs to know what chassis is under my RV. The shop says it probably is either a F350 or E350. This information is important because there are two different converters depending on the exact chassis number. Does anyone know which chassis I have or where on the RV I can find this information. Thanks in advance. Tony