Tube going into cat
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Joined: Jun 2009
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From: Southern Wisconsin.
Car: BMW 330i ///M Sport
Engine: M54 DOHC I6
Transmission: 5 speed
Axle/Gears: Stock
Tube going into cat
Both my '91 Z28's had a small tube coming from the engine bay to the cat, what is that for? Thought it was where the O2 sensor was located...
Joined: Dec 2004
Posts: 1,132
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From: Midwest
Car: '82 Recaro T/A, '71 Trans Am
Engine: 305CFI/455HO
Transmission: TH700R4/M22
Axle/Gears: 3.23/3.42
Re: Tube going into cat
Air injection to help "light up" the catalyst faster and reduced exhaust emissions.
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