Stock Cats

PR370z

Thinking about stripping out one of the two cats in the stock downpipe. Probably the second one, has anyone tried this? Looking for a little more HP and sound without the cost of a high flow cat. Any thoughts?

esfourteen

first, I think you might be confused as to the oem exhaust setup, theres 2 cats total, one on each side, right after the exhaust manifold, before the Y pipe. thats it, no pre/secondary cats.

second, dont ruin your stock cats, pick up a set of CNT resonated test pipes, they cost $200 shipped.

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PR370z

Thanks for the clarification, for some reason I thought there were 4

kielbasa16

Sorry to jack the thread, but I thought of this when I read the title. Cant you sell your stock cats for a good deal of money? Not necessarily to other Z owners but at a scrap metal yard or something? I remember somebody saying never throw away your stock cats, not just because you may need them someday, but cuz they are actually worth quite a bit of money (the cores or something?).

If the cost of the Hi-flow cats is stopping you, maybe look into selling the stock ones to ease the hit.

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hfrog355

Subscribed, because I'm cheap.

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PR370z

will the CNT resonated test pipes give me more sound, or is it better just to go with staright test pipes? Also I already have K&N drop ins, what kind of HP increase should I expect?

Lee123

They've got to be worth something. They steal them off cars in parking lots here in Phoenix. Haven't heard much about it lately but a couple years ago people were going into movies and coming out and finding their car to be much louder than it was a couple hours before.

wishihadnav

yeah there's a small amount of platinum in cats.

tjlazer

You can get atleast $80 from a metal recycler for both cats.

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2009 370Z Monterey Blue,Nismo Conversion,RE-11's, K&N Typhoon intakes,Blue Kickplates,Homelink,FI 18" CBE,ERZ HFCs,Hotchkis sways, Swift Spec-R, EVO-R Highwing, UPREV

hfrog355

Anyone have experience doing this? Sounds like a great way to get some cash for spare parts to me...

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Modshack

My recycler won't take them, primarily because of the theft issue noted above. I've got a fresh set of Corvette Cats in the garage that I'll probably sell to a california guy who unwittingly bought a modded car...

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Zsteve

I would keep the stock cats just in case the HFCs go bad, that way you have a back up plan.

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kielbasa16

I agree with you, your thinking is more long term. I think selling the stock ones right off the bat is more of a short term idea to lessen the blow of the cost of HFCs. Just would suck not to have the stocks in case something happens as you mentioned.

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Mag Black Kielbasa

Lee123

Depending on what you local pollution test laws are, or could be changed to later, it is a real good idea to keep the stock cats in case you need them to pass the test and get your license renewed. Much cheaper than buying new ones from the dealer if the need arises.

Modshack

Never sell your stock stuff.

1) the parts aren't worth much

2) You never know when you may need to bring it back to stock either for a sale or an emissions issue

3) Aftermarket parts can be easily sold later

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