bigb3630123 Posted March 10, 2007 Share Posted March 10, 2007 Should I get the downpipe with the cat or use the stock cat? Its only 150 more to get the new cat. And if I do these Mods will I have a hard time keeping the CEL out? I cant stand having that light on Link to comment Share on other sites More sharing options...
jim1969 Posted March 10, 2007 Share Posted March 10, 2007 cat will help keep noise down. Link to comment Share on other sites More sharing options...
BMac1203 Posted March 11, 2007 Share Posted March 11, 2007 If you have a DP, you MIGHT throw a CEL, seems like it can be hit or miss. An AP will remove the CEL, and you should have an AP if you're putting on a DP anyways. Otherwise, it comes to choice. DP's are illegal in all states anyways, because you are removing/altering a perfectly working cat (illegal). So, yeah it will keep noise down, that's about it. You don't need it to pass SMOG, because our cars are OBDII and don't take the sniffer. I chose catless...cheaper Need a CarPC bezel? PM me! Link to comment Share on other sites More sharing options...
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