Internal exhaust flappers?
#2
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There was just a similar thread recently. Personally I don't like them and you'd think they'd ulter/restrict exhaust flow some. I can't say for sure however I just don't like anything in my exhaust. Ext flappers way to go unless you have under 112 lsa.
Last edited by getrdunn; 05-10-2017 at 08:35 PM.
#6
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#8
Registered
Buddy shattered a piston and punched a hole in the cylinder running these rubber internal flappers. After a bit of use they do not want to lay back flat. Stainless butterfly with the silicon boots for internal. Just need to peak up the tips occasionally as even those can toss a flapper without you knowing it.
#10
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