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post #1 of 12 (permalink) Old 12-05-2012, 02:33 PM Thread Starter
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Cool Homemade y pipe w/o cats

Has anyone made their own y-pipes w/o cats (or chopped off their cats and re-welded) with the stock exhaust manifolds? Can't afford headers right now and I'm pretty sure my drivers side cat has a leak so I'm thinking about just taking them out and either making a new y-pipe or welding in piping where the cats were. I would really appreciate it if pics could be posted. Thanks!
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post #2 of 12 (permalink) Old 12-05-2012, 09:29 PM
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I deleted my cat by just cutting it off and welding in a piece of 2.5" exaust pipe. Its pretty much as simple as it sounds.

94 Z-28 Camaro 6 Speed, 4:10 richmond, ultimate girdle, k&n cai, msd rotor and cap , 8mm wires, Flowmaster, 160 thermostat, m55A oil pump, cat, air, and egr delete

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post #3 of 12 (permalink) Old 12-06-2012, 01:05 AM Thread Starter
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Did your car throw any codes because of the piping? Thats the only thing stopping me from doing exactly what you did
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post #4 of 12 (permalink) Old 12-06-2012, 06:00 AM
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Headers are cheap, around $250 for painted pacesetters. Even cheaper for used ones.

94 Z28 M6 hardtop power nothing LS1 lid, ported MAF, Pacesetter LT's, ORY, dump, 7/16 NSA Pro Mags, CSR EWP, Bilstein HDs, BMR springs, 32 front 23 rear sway bars, MSD opti, NGK TR55s, Taylor 8.2mm, B&M ripper shifter, underdrive pulley, Trifecta tune, LT4 KM, Poly LCAs and short TA, 3.73s, 295/35/18s
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post #5 of 12 (permalink) Old 12-06-2012, 10:11 AM
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Quote:
Originally Posted by Mountain12 View Post
Did your car throw any codes because of the piping? Thats the only thing stopping me from doing exactly what you did
Mine didn't but it is a 94 model car. It doesn't have an o2 sensor in or after the cat. I know later on they started putting o2s in the cats or in the pipe after the cats. If yours has one in or after the cat then it will probably throw a code.

94 Z-28 Camaro 6 Speed, 4:10 richmond, ultimate girdle, k&n cai, msd rotor and cap , 8mm wires, Flowmaster, 160 thermostat, m55A oil pump, cat, air, and egr delete

94 toyota pickup DD

"Its not a hot rod if its got payments"
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post #6 of 12 (permalink) Old 12-06-2012, 10:12 AM Thread Starter
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Do you know anyone thats selling headers? I'm still in college and money is really tight. I was planning on doing his whole procedure myself.
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post #7 of 12 (permalink) Old 12-06-2012, 10:13 AM
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Quote:
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Do you know anyone thats selling headers? I'm still in college and money is really tight. I was planning on doing his whole procedure myself.
Keep an eye on craigslist I've seen several pair on there every now and then.

94 Z-28 Camaro 6 Speed, 4:10 richmond, ultimate girdle, k&n cai, msd rotor and cap , 8mm wires, Flowmaster, 160 thermostat, m55A oil pump, cat, air, and egr delete

94 toyota pickup DD

"Its not a hot rod if its got payments"
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post #8 of 12 (permalink) Old 12-06-2012, 04:23 PM Thread Starter
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Alright thanks for the help!
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post #9 of 12 (permalink) Old 12-17-2012, 10:55 AM
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Not endorsing them but Speed Engineering did have Pacesetter LT headers ceramic coated with or without egr new for around $280 and ORY pipe for around $125. Check their website out I got LTs and ORY pipe to the door less than $450. Worth a shot. I don't like buying used headers never know if the flange is warped, just my opinion. Good Luck!

1997 30th Anniversary (Z4C) Z28 T-Top
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post #10 of 12 (permalink) Old 12-17-2012, 02:19 PM
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With a 1999 car, the PCM will definitely generate a CAT performance failure code if the Cat is missing. There are devices available, however, that install in place of the post-cat sensor that simulate the signal from a good working sensor and keep the codes from occurring.

98 Trans Am, LS1/A4, all stock, original owner
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post #11 of 12 (permalink) Old 12-18-2012, 12:54 AM Thread Starter
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Alright thanks for all the help! I gotta dump my money into a clutch now so gotta wait for the headers. Has anyone tried using spark plug non-foulers to trick the pcm for the second set of O2's?
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post #12 of 12 (permalink) Old 12-18-2012, 07:34 AM
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They sell fake catalytic convertors and or sections of exhaust pipe to weld in.
DSM Intercooler Piping

You can take the material out of the convertors by using a long drill bit in a hand drill or crow bar then start to blast particles out then reweld.

93 Z28 T-tops T56 6spd 3.23 Gears,
Mostly Stock.

Last edited by Viper; 12-18-2012 at 07:41 AM.
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