Which High flow cats for stock manifolds?
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Which High flow cats for stock manifolds? Alright this is my first time postin on the forums (long time reader) I just need a little help here I've got a 2000 Z28 only mods are Slp lid and lm 1 cat back now about a week ago my ses light came on, I ran the codes got p0430 and when im drivin I feel significant drop in performance and so im thinkin the cat needs to be replaced I need to know what high flow cats will work with my stock manifolds, had a shop quote me 618.96 for a factory direct fit cat... at that price might a well do lts and catted y but I dont have the money for that right now. I was lookin at magnaflow spun cats but dont know what size I need. Ive been searchin an only come with stuff for headers. All help is appreciated.
If your planing on lt's and a catted y pipe in the future, I would take both cats out and punch out the guts. Replace and live with the ses light. save the money for a replacement cat and use it for lt's and a y pipe. Do you have emmisions where you live.
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I dont have emissions where im at but I'll be heading back to school in a week or two so I wont be doin headers and y until spring. Thats why im just gonna do high flow cats just to hold me over
Last edited by my85to00z; Aug 5, 2008 at 12:40 PM.
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yea I thought that could be the problem (o2 sensor) I'll just have to get a diagnostic... on a side does note does anybody have an idea as to why after installing my slp lid my ses light is now off, I can still tell theres a issue with cats or o2 but no light???
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From: Wichita KS / Rancho San Diego
GM extended the warranty on factory cats a year or so ago. I got mine replaced at the dealership free. Then I yanked them off and put on LT's - but the dealership did all the hard work busting rusted bolts for me. 
Anyway, check with your dealer and you may get them replaced for nothing.
Anyway, check with your dealer and you may get them replaced for nothing. LS1 Tech Stories
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