DC Modification Is The Leader In Extended Cab Modifications for Peterbilt and Kenworth trucks. The Extended Cab up fit is for new trucks. Your dealer will work directly with our team to have trucks transported through our factory from Peterbilt or Kenworth. There is no additional cost for transportation for this modification. Contact your local dealer for pricing. We are also happy to help you spec your truck. We have direct pricing for Peterbilt and Kenworth. Contact Todd Wagers at 800-450-5723