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The noice doesn't worry me at all. The question is: is this normal? I mean, the rear mufflers (lets say after 3 m tubing + 1 middle muffler) is quite hot.
I'm thinking restrective headers may show the warm gases/ flames rearwards.
2" primaries would dillute more. Maybe?
A retarded cam will let more hot gases out through the exhaust valve? Maybe?
I'll do both this fall/ winter, so I will soon know if this have any effect.
RS
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