generation of the Duramax engine, production of the current Duramax MY2020 L5P scheduled to conclude Q3FY22. An Allison 2500SP six-speed fully automatic transmission is fitted to all JLTVs The JLTV has been designed to comply with the U.S. Army's Long Term Armor Strategy (LTAS). The LTAS system follows an A-kit/B-kit principle, with vehicles designed "fitted for, but not with" protection. Protection kits can be installed and uninstalled from vehicles in the field using basic tools. The A-kit is fitted on the production line and is a combination of a limited amount of armoring, in difficult-to-access areas of the vehicle, together with a significant amount of armor installation attachments and required support structures. The bulk of the armor, the B-kit, is installed in the field on an as-required basis. Two soldiers can install B-kit armor in five hours. An 800-pound RPG protection kit can be installed in two hours at field-level maintenance and completed by the crew within 30 minutes. The JLTV offers protection levels greater than those of up-armored HMMWVs and comparable to those of original MRAP class designs, but in an overall vehicle package that is considerably smaller and lighter than vehicles procured under the U.S. Marines MRAP procurement. The benefits of the A-kit/B-kit principle are that armor is only fitted when required, reducing vehicle wear and tear and, by default, whole lifecycle costs. Improvements and/or upgrades to armor are also far easier to integrate into an appliqué solution. No quantity for JLTV armoring kits has yet been disclosed, but it is anticipated that the estimated $65,000 kits will be procured on a one kit to three vehicle basis. The overall protection will include a spall liner to minimize perforation effects within a vehicle when the vehicle takes hostile fire. The JLTV has an automatic fire-extinguishing system to protect the crew cabin. Fuel tanks are mounted externally and shielded by the JLTV structure. Each crew seat has a combined seat and blast restraint device. Ingress time for a crew of four in combat equipment is 30 seconds or less. Egress with B-kit doors is within 10 seconds. The only weight-related data officially released includes a gross vehicle weight of 10,266 lb. Payload for the two-door variant is quoted as 2,318 kg, payload for the four-door variant is quoted as 1,590 kg. The USMC required a vehicle that can be transported by their current and planned systems. In April 2009,