Chevy Cobalt DF/S and maybe keep it streetable

[Mike Meier]

Originally Posted by Dave Gantz

Sounds like a fun project, Mike. Where Stock came from.
Moving the cat back may not work. I'm no expert, but I think they need to be a certain temp be effective, and can't achieve that if they're too far back.

Maybe I can just have two identical length down-pipes since they are both options on this web site. One with a cat for street driving; the other I can swap on when I get to the track.

Hell, the annual inspection isn't due until September and the last D-4 divisional is in July; maybe I'll do a cat-less down-pipe until inspection time as long as it doesn't throw a check engine light. In reality this is just going to be used for driving to Baytown for the monthly bracket points races and to 4 or 5 LODRS.

[6130]

Originally Posted by Mike Meier

Maybe I can just have two identical length down-pipes since they are both options on this web site. One with a cat for street driving; the other I can swap on when I get to the track.

Hell, the annual inspection isn't due until September and the last D-4 divisional is in July; maybe I'll do a cat-less down-pipe until inspection time as long as it doesn't throw a check engine light. In reality this is just going to be used for driving to Baytown for the monthly bracket points races and to 4 or 5 LODRS.

You should be able to use a spacer for the rear O2 sensor to minimize check engine light problems when using a catless exhaust system.