FullArmor Posted September 26, 2023 Share Posted September 26, 2023 Are these exhaust or not? Is this somekind of flappervalve or straight pipe? Please help! 1 Link to comment Share on other sites More sharing options...
Martinnfb Posted September 27, 2023 Share Posted September 27, 2023 Flaps, but often removed . 1 2 Link to comment Share on other sites More sharing options...
dodgem37 Posted September 27, 2023 Share Posted September 27, 2023 Exhaust valve. As also seen on tractor-trailers. Sincerely, Mark 1 2 Link to comment Share on other sites More sharing options...
FullArmor Posted September 27, 2023 Author Share Posted September 27, 2023 Thank you all👍. Now i must replicate those somehow...maybe using thin aluminum or copper. 2 1 Link to comment Share on other sites More sharing options...
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