The S25 has a wide array of engine options and comes standard equipped with the PCM ZR4. There is the option to step up to the PCM and GM Marine direct-injection engines that provide industry-leading power in both the 5.3L PCM ZZ5 and the 6.2L PCM ZZ6. If you’re looking for more power, the S25 has three additional engine options that include the 7.4L naturally-aspirated PCM ZR7, the Yanmar 8LV Diesel engine that delivers 595 ft-lbs. of torque, or the most powerful engine in the industry, the PCM ZZ8, that provides 600 horsepower and 608 ft-lbs. of torque.