what are these exhaust flapper valve thinggys for? what do they do?

>>17753976
Prevents rain water from pooling in the exhaust. Cmon OP think for half a second before posting a new thread.

They don`t let water in when it rains

Keeps indians form mistaking them as a shit pipe.

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Make idiots wonder what they are and fill up a thread spot on /o/

>>17753976
Keeps wild mouses and rats out

>>17756063
Wild mouses dont exist

>>17756063
>>17756069
Think twice, it's mice

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What are these tube tubes sticking off the side of the engine for?

I only see them on a few engines.

>>17756113
They're direct intake pipes, usually designed to induce a very clean swirl you wouldn't get with an air filter and ducting. Pretty much useless outside of racing NA only classes

>>17756113

Why is the brake fluid reservoir wearing a hat?

>>17756283
because its cold

>>17756283
Big hat theory of leadership. It is displaying dominance over the master cylinder.

>>17756283
it's suppose to shield the brittle plastic from the UV coming off the exhaust header, but as you can see the poster is using a fram filter so wont be going fast enough to get the engine hot before his check valve seizes