lexas dave Posted November 8, 2008 Share Posted November 8, 2008 MY 1990 LS 400 DID NOT PASS SMOG BECAUSE OF HIGH NOS. MOST LIKLY I NEED A NEW EGR VALVE. WHERE CAN I GET THE BEST DEAL? Quote Link to comment Share on other sites More sharing options...
jcrome04 Posted November 9, 2008 Share Posted November 9, 2008 You should figure out exactly what the problem is before you just start replacing parts in a hope that it'll be the right one. Oh yeah, and only one thread should be necessary per topic B) You can try Carson, Sewell, or Irontoad, just to name a few. Quote Link to comment Share on other sites More sharing options...
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