Why Do Trucks Have Those Flap Things?

[VB-]

well?

[raps86]

i think its to help with engine braking as when they back off the juice it shuts and creates pressure in the exhaust to restrict the engine from reving high.

[jrocket]

Are ya talking bout the hat thingo on top of the pipe? If that wat ya talking bout, i think its to stop water, birds, crap etc goin into the exhaust. Meh not totally sure on that.

Engine brake is usually further back up the line i think?

[Al]

i think its to help with engine braking as when they back off the juice it shuts and creates pressure in the exhaust to restrict the engine from reving high.

Engine brake creates more exhaust gases, thus opens the hat .

jrocket is pretty much spot on.

[sh@un]

just to stop stuff falling down there when the engine isn't running (i.e- rain)

[JAGR33]

To stop anything from going down the pipe..

That is all!!!!!!!!!!!!

Engine brake is further down the piping towards the muffler, got nothing to do with the flap attached to the end of the exhaust.

Such a bizarre question....

[R31Nismoid]

Its not bizzare in someones mind Jack...

But then not all people are logical

[JAGR33]

Question answered, close thread???

[wuked]

I've alwys wondered why they have them. Above reasons make sense. But doesn't explain why I've seen them on country utes (a particular VY saw the other week comes to mind) with dual pipes sticking (horizontally) out the back with flaps??? It can't be for looks, cus it looked stupid lol

[Al]

I've alwys wondered why they have them. Above reasons make sense. But doesn't explain why I've seen them on country utes (a particular VY saw the other week comes to mind) with dual pipes sticking (horizontally) out the back with flaps??? It can't be for looks, cus it looked stupid lol

Rednecks........................

need i say more

[chris_r31]

if u look at a truck exzorst, it goes str8 down to the turbo, some have mufflers an some have str8 thru systems, now if it rained which way would the water run an were do u think it will end up..

ok b4 some makes a new thread about my question, the rain goes down the exzorst and into the turbo..

so some smart redneck decided to put a flap on the top to stop water and shit f*kin the turbo up...

EDIT: im pretty sure it wasnt a redneck that designed the flap..

[joeyjoejoejuniorshabadoo]

no... the redneck was too busy playing with his sisters flap...

it was asking for it! you know it... we all know it

[catchmydriftr32]

burned

[Cool Hand Luke]

Im welding a wastegate flap on the end of my exhaust on my charade. Should add extra boost...

[vinnie32GTS4]

thats filthy lol