[JIGSAW424]

Does anybody know why our exhaust pipes have that hole in them towards the end? It seems like you would lose back-pressure.

 

[TheBFA]

I'm just going by memory, but I think it's for cooling the exhaust before it exits the end.

 

[AZPRO4X]

What he said ^^
Also you could put a 10" pipe on it and it really wouldn't matter because the Particulate Filter is so restricted.

 

[mech812]

back pressure is bad for turbo engines.

 

[TheBFA]

Yep, the turbo creates all the back pressure you need.

 

[ruquik]

Does anybody know why our exhaust pipes have that hole in them towards the end? It seems like you would lose back-pressure.

due to extreme exhaust temps esp during regen