Tim Sletten on Instagram: "With the engine being the most expensive piece of an 11 car, it’s important to stay up on the maintenance. @blakewilkey357 constantly has races on his schedule and is probably harder on his equipment than anyone else. Every race you should be at least adjusting valves, changing spark plugs and changing the oil. #slettenengineering #mphmotorsports #shreddy #class11 #clase11 #vw #offroadracing #offroad #aircooled"