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The ZR6, a 6.0 liter GM Vortec engine, makes 375 horsepower and when equipped with PCM’s famous Power Plus 1.23:1 transmission, an incredible 492 foot-pounds of torque. The ZR6 features PCM’s totally new HO exhaust system, which has high performance aluminum heads and is freshwater cooled. The distributorless ignition with platinum tip spark plugs stretches maintenance intervals into years. The serpentine belt system with auto-tension makes it incredibly easy to change the impeller – it takes less than two minutes and two tools to swap it out from the observer’s seat. The ZR6 features the industry’s first modular raw water pump, with direct-engine mount – no bracke ts for increased durability. The stainless steel pump is tough and specially engineered for the demands of the marine environment. The ZR6 is super quiet, incredibly smooth, and provides neck-snapping performance. And for all this power, the ZR6 still runs on standard octane fuel while the competition’s high performance engines require premium.