OTC's 5870 Injector Timing Gauge Set includes an assortment of height gauges used to properly set injector body height to the injector follower for proper fuel injector timing. Incorrect injector timing can cause engine power issues, poor idle quality and fuel mileage issues. For use Detroit Diesel 2-cycle 53, 2-cycle 71, 2-cycle 92, Series 60, and DDEC IV engines. Set includes 7 height gauges: 1.460" (37.08 mm) - p/n 5870-1, 1.484" (37.69 mm) - p/n 5870-2, 3.078" (78.18 mm) - p/n 5870-3, 3.102" (78.79 mm) - p/n 5870-4, 3.161" (80.29 mm) - p/n 5870-5, 3.199" (81.25 mm) - p/n 5870-6, 3.232" (82.09 mm) - p/n 5870-7 and a foam organizer tray. Select gauges have dual handle mounting locations for use on applications with Jake Brakes. Individual tools included in this set are similar to J-1853, J-42749, J-45002, J-39697, J-42665, J-1242, and J-35637-A. Made in the USA. Value is at the core of the OTC tool and equipment portfolio. Whether it's a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it's a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians' productivity and shop profits.