used ATK as replacment engine in dodge minivan. 4 cly chrysler, waited 2 weeks longer than promised, 15000 miles into it lost all oil presure on the thing. When I contacted warrenty services they were rude. They required me to use a certified mechanic to verify no oil pressure. Warrenty claim went through and received replacement engine. 10000 miles into it and of course outside the 18 month unlimited mile warrenty which is calculated from the original purchase date, lost oil pressure at idle again. I cross my fingers every time I drive the thing. I will never purchase an ATK motor, either stock replacement or their performance line. I will never recomend anyone to purchase an engine from ATK