Cars and Light Duty Trucks: 3 Years - Unlimited mileage warranty includes any long block engine installed in any automobile or light duty truck up to and including ¾ ton, NOT commercially registered and NOT used for business purposes. 3 Years - 75,000 miles warranty includes long blocks installed in vehicles up to and including one (1) ton commercially registered or used for business, as well as privately owned one (1) ton vehicles. All long blocks in any special use applications such as stationary units will have a 90 day warranty. * Exclusions: Ambulance, Off Highway Use, Package Delivery, Police, Taxi, Limousine, Tow Truck or any vehicle over one(1)ton. 18 Months or 75,000 miles warranty includes any vehicle over one (1) ton, industrial, Box Trucks, Dual Rear Wheels, Service Bodies and non-automotive use. Marine Engines: 24 months - Unlimited Hours Cylinder Heads: 6 months - Unlimited Mileage Short Blocks: 6 months 6,000 Miles Performance Engine Warranties: HO, Stroker & Marine Performance: One Year Unlimited mileage/hour warranty covers original engine only, no labor for removal or replacement of engine. Covers manufacturer & parts defect only, to be determined by Promar inspection. If deemed to be non manufacturing fault, a fair assessment of remanufacture cost will be provided. If customer denies offer to rebuild all parts will be returned to customer. Street Strip, Racing Series & Short Blocks: NO Warranty due to the nature of use they are intended for. Promar reserves the right to change vendors or part specifications without prior notification. All HP and TQ ratings are achieved on a Superflow Dyno in a controlled environment and tuned for maximum performance output. Actual HP in vehicle can vary due to tuning and bolt on items utilized by vehicle owner. Promar assumes no liability on horsepower output in vehicle.