We have been taking our jeep to John for about 5 years, recently we have decided to rebuild our engine and up grade to better transmission. All i can say that John and his crew did a great job our jeep runs GREAT he had to modify the transmission and again his crew did a GREAT job. We run our jeep hard and every time we take it out it gets better Thank you again A SMOG &MUFFLER great job Doug and Sandy.