National Power Supply sells defective Cat 3208T Engines. I should know... I purchased two of them this year and within 50 engine hours one of the engines failed due to cracked exhaust manifolds that were installed as parts on their "Factory Remanfactured Engines". A complete engine failure! This failure was not supported fully by the seller so we had to hire Peterson Cat in Portland, Or. To pull out the failed engine and hire them again to install the replacement engine. I will never buy engines from National Power Supply again.