Finally getting the CAT in! - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 10-15-2005, 02:44 AM   #1
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Default Finally getting the CAT in!

I've had the Flowmaster 2 1/2" CAT sitting in my trunk of my '93 SE for months now
Partly because I figured I'd wait until I got a Flowmaster muffler & put them both in at once, but mostly because of the laws here in NY that don't allow a shop to replace a good/working CAT ... If the exhaust system wasn't all welded I'da put it in the day I got it!
But, since my welding skills/equipment are non-existant, there it sat in the trunk, tormenting me!
I finally found a shop that would put it in for me, but I had to drill a hole in the existing one so that they could "legally" replace it [?!]
My question is: seeing how I still have the stock muffler [although I was duly impressed with the size of it], and considering the mods I've done [K&N CAI, 180 T stat, removed MAF screen, new plugs/wires/O2 sensor/fuel filter/PCV valve, cleaned TB & MAF sensor], should I expect to feel any gain from just the hi-flow CAT?....In other words, is the stock CAT more restrictive than the stock muffler?...And will I hear a difference?
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Old 10-15-2005, 05:18 PM   #2
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usually the muffler is the least restrictive component in the exhaust, the exhaust manifolds are the most restrictive,then the Cat, so i would say you might just notice a bit of a difference, and it should be a little louder as well.
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Old 10-15-2005, 07:22 PM   #3
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x2

If you want to destroy your stock cat just run a tank of leaded gas.
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Old 10-16-2005, 09:23 PM   #4
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Well, after a day or two of driving her around, I do notice a little more power and the exhaust does sound a little better/louder
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Old 10-16-2005, 11:41 PM   #5
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Ukie, you coming to the NEBF this coming weekend in CT. Couple other people coming in from your area. You should get together with them and convoy it here with them
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Old 10-16-2005, 11:45 PM   #6
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Quote:
Originally Posted by Highlander
Ukie, you coming to the NEBF this coming weekend in CT. Couple other people coming in from your area. You should get together with them and convoy it here with them
yes come!!!

Jimmyfloyd and Singscounty are likely going out thrusday night. I will be going out friday morning (sometime after 9)

you should definately come out to NEBF.
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Old 10-17-2005, 07:03 AM   #7
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X3 I'd like to do this mod as well... Love to check out yours with the stock muffler.
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Old 10-17-2005, 01:50 PM   #8
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Unfortunately, I'll be out of town this weekend... :(
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