You would use the BT ISO DIN version.  Get the BT ISO DIN PLUS if you need a set of radio removal   Read more...

Our info shows 4" and 6 1/2 " speakers were used in Western   Read more...

If the motorhomes was built on a semi truck frame , then we do.  YOU MIGHT WANT TO PULL THE RADIO FIRST TO MAKE SURE THE MOTOR HOME MANUFACTURE DID NOT REMOVE THE TRUCK'S RADIO HARNESS AND REPLACE IT WITH THEIR ON CONNECTOR.  then a pic will help ID   Read more...

Most 5x7 are will have same bolt pattern.  Some manufactures might trim off the usual multi hole mounting tabs for just the ones need for that application.  About the only change would be the depth of the speaker determined by the magnet size usually.  We sell OEM style that are not so deep.  Here is the link to them as they are on a sister site FARM RADIO   Read more...

BT ISO DIN should be the right one unless you have the SmartNav version with   Read more...