Specifications include, but are not limited to: 3.1. Contractor shall perform work at their shop or location. 3.2. Contractor shall furnish all labor, materials, and equipment to rebuild Cummins ISL 280 Engines (in-frame), to original manufacturer specifications. 3.2.1. Includes in frame overhaul with all new pistons/liners, cylinder head, turbocharger, injectors w/new pass through connectors, oil cooler, bearings, front main seal & cover, rod bolts, oil pump, water pump, t-stat, belt, fuel filters, air filter, engine oil, coolant, exhaust manifold studs/bolts. 3.3. StarTran’s Gillig Low Floor Transit Bus fleet include: 3.3.1. 9 each - 2004 Gillig Low Floor Transit Buses; 3.3.2. 14 each - 2006 Gillig Low Floor Transit Buses; and 3.3.3. 13 each - 2011 Gillig Low Floor Transit Buses. 3.3.3.1. 2004 Gillig Low Floor Transit Bus with a Cummins ISL 280