2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.
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gutting pre and leaving main.

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Old 04-28-03, 05:04 PM
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gutting pre and leaving main.

ok a i have a 86 N/A and i just got a brand new main cat a week ago and ive never checked the pre's and i was thinking of gutting the pres only. my question is will this help? since thier the originals. Also will it sound bad without the pres and just the main and will i get any type of power out of this. Thanx ahead
Old 04-29-03, 10:49 AM
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bump need answer
Old 04-29-03, 10:55 AM
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I gutted all three of mine with stock cat-back, and I think it sounds pretty good...Still not loud.
Old 04-29-03, 11:08 AM
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but is still need to pass emi tests can i just with the main???
Old 04-29-03, 11:42 AM
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The pre-cats are only for initial start up.
They prevent that stinky cold engine smell.
After that they are not needed.
If it would pass visual inspection, consider replacing the iron box collector & precats with a header.
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