my85to00z

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.

conan

iTrader: (5)

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.

my85to00z

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

snake charmer

iTrader: (118)

save yuor money on the high flow cats or replacement cat . lts and a y will be way cheaper and a lot more fun . you might have a bad 02 sensor .

my85to00z

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???

94'BLKBRD

iTrader: (76)

Did you remember to plug in your sensors after installing the SLP lid?

my85to00z

yea as far as I can tell they're in, but no ses light.

RevGTO

iTrader: (12)

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.