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12-05-2012, 02:33 PM
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#1
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Regular Member
Join Date: Apr 2012
Location: New Mexico
Posts: 11
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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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12-05-2012, 09:29 PM
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#2
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Regular Member
Join Date: Sep 2012
Location: East TN
Posts: 66
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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
94 toyota pickup DD
"Its not a hot rod if its got payments" 
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12-06-2012, 01:05 AM
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#3
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Regular Member
Join Date: Apr 2012
Location: New Mexico
Posts: 11
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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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12-06-2012, 06:00 AM
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#4
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Regular Member
Join Date: May 2006
Location: Waldorf, MD
Posts: 1,037
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Headers are cheap, around $250 for painted pacesetters. Even cheaper for used ones.
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94 Z28 M6 hardtop power nothing LS1 lid, ported MAF, Pacesetter LT's, ORY, dump, 7/16 NSA Pro Mags, CSR EWP, Bilstein HDs, WS6 front springs, MSD opti, NGK TR55s, Taylor 8.2mm, B&M ripper shifter, underdrive pulley, Trifecta tune, LT4 KM, BMR rod ended LCAS, PR, and TA, UMI TA relo, 9" 4.33s spool, 12.39 at 111 1.67 60'
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12-06-2012, 10:11 AM
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#5
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Regular Member
Join Date: Sep 2012
Location: East TN
Posts: 66
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Quote:
Originally Posted by Mountain12
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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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.
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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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12-06-2012, 10:12 AM
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#6
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Regular Member
Join Date: Apr 2012
Location: New Mexico
Posts: 11
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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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12-06-2012, 10:13 AM
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#7
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Regular Member
Join Date: Sep 2012
Location: East TN
Posts: 66
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Quote:
Originally Posted by Mountain12
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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Keep an eye on craigslist I've seen several pair on there every now and then.
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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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12-06-2012, 04:23 PM
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#8
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Regular Member
Join Date: Apr 2012
Location: New Mexico
Posts: 11
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Alright thanks for the help!
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12-17-2012, 10:55 AM
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#9
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Regular Member
Join Date: Dec 2011
Location: Tollesboro, KY
Posts: 12
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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!
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1997 30th Anniversary (Z4C) Z28 T-Top
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12-17-2012, 02:19 PM
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#10
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Supporting Member
Join Date: May 2012
Location: Florida West Coast
Posts: 193
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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.
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98 Trans Am, LS1, automatic, stock all around.
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12-18-2012, 12:54 AM
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#11
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Regular Member
Join Date: Apr 2012
Location: New Mexico
Posts: 11
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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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12-18-2012, 07:34 AM
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#12
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Regular Member
Join Date: Jul 2010
Location: New Mexico
Posts: 881
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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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