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When installing Pit Bike engines you may run into different types of exhaust pipes and head ports
1) Honda type 6mm stud w/ angle "A"
2)KLX type 8mm stud w/ angle "B"
The two types are at only a slightly differnt angle
they dont directly interchange but are so close that they can be made to fit
buy various means
We sell 2 helpful items
1) Grinding the pipe collar end to match the angle
2)Copper Exhaust gaskets
Using 2-3 Crush-able exhaust gaskets in a stack can take up the gap