I put a K & N open element filter on my car today and its pretty loud. I left the bottom of the stock airbox in there for it to rest against but what is that hose that connects to the side of the stock airbox and is it ok if i dont have a filter on it?

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--Zach
2002 TT 225 Coupe Quattro

I have a filter from autozone on mine it was like 9 dollars I think

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2001 Aviator Gray 225Q
soon to be GT3076R Powered

Yea i bought i filter for mine too but i am just wondering what the hose is for and where it leads to.

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--Zach
2002 TT 225 Coupe Quattro

secondary air injection.

when i did my oil cooler, I took the hose right out, and wedged some foam over the SAI pump inlet. One less thing to F with when Im working around the engine.

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THIS SPACE FOR RENT

Not to mention the hose gets so brittle that it cracks when you touch it. I replaced part of mine with some heater hose. I have a small breather filter on mine that came with the P-Flow Kit from Nuespeed.

well when people put on the shroom filter or whatever filter on the maf do they just do the sai delete then? Or do they just leave a hose going to nothing? lol

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Tiburon free since 06/19/08

^they put a breather filter or microphone cover over the SAI hose.

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makes sense haha

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Tiburon free since 06/19/08

mines

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<WAR PIGS>

why didnt you remove the whole airbox? so you dont have to screw with that sai hose?

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Tiburon free since 06/19/08