i got my precats off but i dont really see what to gut. i see the little mesh around the inside covered by metal, does the metal come out too??

 

All that you can get out. i used a 1.5 foot screwdriver and a hammer, and just beat it all out. It is a good mod until you can afford a header.

 

I used a broken broom handle and reemed the heck out of it. When you're done, it's an empty case.

I just wish somebody sold a pipe to replace them and still use the stock main-cat for a resonable price.

Cory

 

ur all talkin about the precats right, i see how the main should be done. should i do the main too???



i have an 86 na

 

Depends on weather you need to pass emissions or not

Cory

 

i dont right now, but is that what the precat is supposed to look like on the inside, just a little mesh around the edges, not all the way through

 

There's supposed to be a ceramic honycomb-looking brick in there. You want to be rid of that brick and anything else that restricts the flow.
IMPORTANT!!! do NOT breath in the dust from that cat. Very bad juju in there.

Cory

 

hmmm, i dont kno, i dont see any honey combs just a steel wool lining

 

make it hollow, no honey combs? odd, i guess get rid of the lining

 

heh, maybe the previous owner had the same idea

 

dont gut.. if u are gonna get rid of the cat take it to an exhaust shop and get them to make a pipe to put in its place

 

good call bcty......just remove them and have a meineke (where i got mine done) weld you a pipe from the manifold to the cat......ittl bebetter because ittl be a straight pipe instead of the hollowed precats........cost me about 40 bucks and saved a headache

 

Or u can get some bonez racing pipes, www.rx7.com

good place, free shipping

 

today i went to muffler shop to see if he would replace the precats but he said he didnt wanna get in trouble. anyone kno a place in sac that will do it??

 

I just took my car down to rotary performance (in manassas VA) for them to make me a custom main cat replacement midpipe

 

My muffler guy said "You know I gotta reintsall the cats."
I said "How about installing them in the trash?"
He said "Cool.."

 

Sureshot your muffler guy rules!!!!

 

haha rock on! Nobody in duluth will even touch my exhaust without cats

 

ya they "can't" do that for you because if it comes back to them the'll get screwed. kemozabi just go down to the muffler shop and have them make you a pipe for the pre-cats, then have them reinstall your pre-cats and tell them you just want the pipe for when you go to the track. they shouldn't have a problem with it then. just make sure they flange it so you can switch them. as for punching the pre-cats it's fine don't worry about it yes it's better to go with a sraight pipe from a muffler shop but, if you are poor like me or cheap like me also:bggrin: then just take a bar or something to the pre-cats and punch out everyting until you see daylight on the otherside of them. prob why you don't see the honeycomb is they are so freakin cloged that you can't see anything.

 

I dont kno whats goin on. I can see daylight through the precats, the only noticable thing is the little ring on the inside. i tried to stab it out and its not going anywhere. but il go somewhere else and see what they can do. i told him i would come in to the shop acting like the pipe just fell off but he still wanted no part, and i told him id change it myself, no again, but he did tell me i can go beat it out myself.

 

keep the cats...you'll wish you had them when you need to pass smog, esp here in ca (unless this is your race car...then ignore the rest of this message).

you're best bet would be to buy the bonez race pipe or the power pulse thingy from racing beat and keep your cats for smog.

john

 

just tryin to take my money

 

kemosabi, just keep punching on the front pre-cat there is a large screen in the front. just keep on pushing i had to take a hammer to my pipe inorder to get through that. so just keep punching, by the way what are you useing to punch through it?

 

a hammer and a long flathead screwdriver
aint doin a damn thing