08-08-2013, 12:06 PM | #1 |
Drives: 2011 2SS Join Date: Jun 2013
Location: Kansas City
Posts: 997
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drilling out cats to do or not to do
so first is there a disadvantage to drilling out high flow cats over running the off road mid pipes besides the work to do it and second how are you guys drilling them out just a big drill bit and going to town or any other secrets to doing this.
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2011 2SS,fti th400, ECS 1500, Flex Fuel, Boost built 376, squash fuel system
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08-08-2013, 12:16 PM | #2 |
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No advantage to be had IMO. Just get some off road pipes and be done with it. You can then sell you CAT's, make a few bucks or hold them in case you move to a place that does emissions testing.
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ProCharger P1X, Vengeance Racing Kaotic Cam, ARH Headers and Exhaust with Borla ATAK mufflers, MGW Shifter, MTI Drop Springs, Forgeline RB3C Wheels, 3.91 gears, Night Owl LED Control System
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08-08-2013, 12:24 PM | #3 |
Drives: 2011 Camaro 2SS/RS Join Date: Oct 2011
Location: Texas RGV
Posts: 794
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I cut the connections to my Kooks high flow cats and welded a pipe the same size as it was previously.
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08-08-2013, 12:29 PM | #4 |
Drives: 2011 2SS Join Date: Jun 2013
Location: Kansas City
Posts: 997
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ya I have them posted for sale but if they dont sell in the next few days I am probably just going to drill them out
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2011 2SS,fti th400, ECS 1500, Flex Fuel, Boost built 376, squash fuel system
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08-08-2013, 10:45 PM | #5 |
Drives: 2011 Camaro 2SS/RS Join Date: Oct 2011
Location: Texas RGV
Posts: 794
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Mine didn't sell and even if they did I would've just got what the off road pipes would of cost. Which was fine with me but then I would've had to wait for shipping and what not. I just cut them and was on my way
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08-09-2013, 10:07 AM | #6 |
Drives: 2011 2SS Join Date: Jun 2013
Location: Kansas City
Posts: 997
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Ya Dark thats the same delima I am in if they sell it will be for enough to buy off road pipes, or i could just drill/punch out my cats now put them on and be done with it. I just dont want the car to sound bad I am not sure how hollowed out high flow cats will change the sound over some off road pipes.
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2011 2SS,fti th400, ECS 1500, Flex Fuel, Boost built 376, squash fuel system
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08-09-2013, 10:27 AM | #7 |
Drives: 2011 Camaro 2SS/RS Join Date: Oct 2011
Location: Texas RGV
Posts: 794
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I didn't notice any sound difference
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08-09-2013, 11:36 AM | #8 |
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Those cats are expensive, need a loan just to buy them. Just replace with a pipe use the cash for a mod.
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08-09-2013, 01:06 PM | #9 |
Drives: 2011 2SS Join Date: Jun 2013
Location: Kansas City
Posts: 997
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ya I already had the cats previous owner put them on when he did the exhaust no way I would have paid for them, I ordered the off road pipes to put in there they where 250 I am not sure how much an exhaust shop would have charged to match a pipe up to my headers since its flanged I figure i would have been 200 deep pretty quick if they would have done it so I will just roll with the off road pipe for now and keep my cats for down the road.
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2011 2SS,fti th400, ECS 1500, Flex Fuel, Boost built 376, squash fuel system
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08-09-2013, 01:12 PM | #10 |
Drives: 2006 Z06 Join Date: Oct 2010
Location: Gilbert, AZ
Posts: 5,712
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Just get a piece of pipe. Taking them to a metal recycler would get you enough to not justify drilling them out. Cats aren't cheap.
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Nick
Corvette Z06 -1200ish rwhp |
08-09-2013, 05:14 PM | #11 |
Drives: Maggie blown LS3 vette Join Date: Aug 2009
Location: SE TX
Posts: 1,490
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The only reason to use the hollowed out carcasses would be to pass a "visual" test at your next inspection. If that's not necessary, sell them for what you can get, and put o/r pipes in their place.
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