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I have 2011 (12) winnebago rv and the brakes really leave a lot to desired. Its an e450 DRW but I cannot find info on front design of rotor system. Is it a split design where the outer portion of the hub can be separated from the brake rotor. from the inside of the hub? I have looked at parts pictures and they are no help. Some show just a rotor, others show a complete hub assembly with the rotor as a component not separate!
I don’t know anything about the dually situation, but I’ll tell you that PowerStop Truck and Tow upgrade will provide the confident braking that you seem to lack.
Move had them repeatedly in the past and they are impressive.
I recommend you get them from RockAuto.com.
EagleFreek has this right---look for Motorcraft BRRF-115 which are spec'd for the E450 chassis that typically come with DRW. RockAuto does have them and here's an eBay link to at least one seller---if nothing else check this for photos of what you're seeking: Motorcraft BRFF115 Pricing they seem to range from $105 and higher---a few on eBay are new never used with slight touches of surface rust--for less than $60: NOS BRRF-115
For front pads I very much like the NAPA Ultra Premium line---they give great stopping power and are easy on rotors too.
Over the years I've found the Ford OEM or Motorcraft rotors along with the NAPA UP pads to be a long lasting combination. They're right up there with quality and effectiveness IMO.
Like JWA, I use Napa Premium front brake pads. However, if I can find NOS (New Old Stock) Ford brake pads on eBay, I buy them. I tend to favor Ford or Motorcraft for most of my replacement parts. You cannot go wrong with Motorcraft rotors and they should serve you well for 50k plus miles of superior stopping power.