mate i would 100% shave the pistons down its ok doing that here in our cold climate but there in bangladesh its roasting all the time very good for det and run the ct9 on low boost only the 5e really reallly heats the hair dryer up high also about the topmount just fit it upfront to get cool air if you cant get a fmic yet use old exhaust pipe if you cant find aluminium pipes reply above , that comment makes nooo sens its the 5efe thats the useless engine if you lower the comp you have a very strong engine much better then a shitty 5efe with there toothpicks rods