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Old 03-27-2014, 08:46 PM   #1
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Join Date: Mar 2014
Location: Michigan Center,MI
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cat delete or high flow

Hey new to the ls1 just bought an 01 z28 auto 83k bone stock except for the K&N filter,getting the unpleasant rotten egg smell so I guess the exhaust is the first mod on my list. Should I delete the cats or replace them live in mi no emission tests and I daily drive almost 100 miles a day to work and back
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Old 03-28-2014, 03:56 PM   #2
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Posts: 943
Re: cat delete or high flow

Michigan? Hell yea get rid of them! Get a nice set of long tubes and a good cat back. If you are worried about sound, try the dynomax muffler that has the flapper valve.

11 Silverado - No times yet.
99Z28 - 11.91@118.5. 403 L76/L92 with street tires and launching with the traction control.
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Old 03-28-2014, 06:20 PM   #3
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Location: south carolina
Posts: 259
Re: cat delete or high flow

ive used random tech cats but they are high ... very easy to tune out with EFI live
99 SS vert M6 slp#0405 21k miles 13.21 no tune
99 z28 cam only hard top mystic teal metallic a4
06 TBSS 2wd 13.55 89 TTA#299 89 TTA#1397 built
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Old 03-29-2014, 09:37 PM   #4
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Location: Michigan Center,MI
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Re: cat delete or high flow

wasnt sure if it would hurt anything was leaning towards long tubes no cats and slp lm1 or a flowmaster
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Old 03-29-2014, 09:37 PM
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