When I get around to putting my exhaust system on, I really don't want to waste my money on a cat since I don't have any of the rest of the emissions equipment. I think what I will do is pick up an old cat from the junkyard and tear it apart so it's just the shell. Then, I'll just have the muffler shop weld the pipe all the way to the muffler and weld the cat shell to the pipe. That way, if an inspection person looks undeneath the car, it'll at least pass visual inspection. Around here, 1 out of 20 places actually know what the emissions equipment under the hood looks like anyway. All they care about is that there is a cat, and there aren't any holes in the pipe or muffler.

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82 Camaro:
350, Erson cam, ported heads, Crane Hi-6 ignition, Accel supercoil, Comp Cams 1.6:1 rocker arms, Turbo 350 tranny with 2500 stall.

 

if you take an empty cat and an exhaust system to a local muffler shop they will NOT weld it in for you because they can have their buisness shut down because it's illegal. if you take a new hig flow cat they would weld that in but not an empty shell. you'd have to do it yourself.

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1991 RS LO3
mods: 14" chrome air cleaner, straight-piped after cat exhaust with one chrome dual tip on the left side.
future mods: headers, removing smog equipment, and as many cheap mods as i can find
aol s/n: budman8503

SUCKING GAS AND HAULING *** -The American Dream

 

Just to let you know, a junk yard will not sell you a used CAT, at least they won't here in AZ. Also, if you try to rip the shell appart, you'll tear up the shell. I already tried. What I did was took one of the cats that I blew and finished gutting it out. Once it was empty, it used a pipe expander and expanded it JUST enough to slip a 2.25 pipe inside of it. Don't expand it too much or you will break the pipe. Once that's done, weld it up and nobody can tell unless they are looking for it. Just remember, if you do this, to take your time.

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'91 Z-28 5.7, SLP 1 3/4 headers, 4 inch Mufflex/Flowmaster cat back, gutted cats, Edelbrock intake, 8.5mm Jacob wires, MSD Blaster coil, S&W subframe setup, Jacob Pro Street Ignition, complete Kenwood system.

 

Thanks guys. I'll have to see if the junkyards around here will sell a used cat or not. I ought to be able to take care of the rest.

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82 Camaro:
350, Erson cam, ported heads, Crane Hi-6 ignition, Accel supercoil, Comp Cams 1.6:1 rocker arms, Turbo 350 tranny with 2500 stall.