LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Cat-back Performance

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Old 02-02-2009, 02:28 PM
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Default Cat-back Performance

Is the muffler the determining factor in how a catback performs?
Old 02-02-2009, 02:58 PM
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Kind of,

The pipe size, bends, and the muffler its self determine how well a catback flows. I went with a magnaflow, it flows good, but it is just too mellow for my liking. I think a cutout will fix my problem though
Old 02-02-2009, 03:19 PM
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Originally Posted by TasTe_GOOD
Kind of,

The pipe size, bends, and the muffler its self determine how well a catback flows. I went with a magnaflow, it flows good, but it is just too mellow for my liking. I think a cutout will fix my problem though
+1. I like the way Magnaflows sound (Magnaflow > Flowmaster). Add an electric cutout for when you want to sound mean and have no restriction at all.
Old 02-02-2009, 03:32 PM
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I like whatever SLP muffler is on mine, not a LoudMouth though as mine is the Single In Dual Out stock type.

When you get a cat-back setup it is generally consisting of better bends in the exhaust, along with a size increase for more flow. I'm not sure but I think the single cat exhaust flows 3" in and then 2.5" to the muffler. I think the dual cats are like 2" from the manifolds through the cats and Y into a 2.5". Someone will have to correct me on that though.
Old 02-02-2009, 05:34 PM
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A cat-back with a bullet muffler is gonna breathe alittle better than chambered muffler.
Old 02-03-2009, 12:19 AM
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Hooker catback w/ cutout.

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Old 02-03-2009, 06:56 AM
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Hmm, thanks for the input. Only reason I am asking is because I have developed an annoying rattle when my car is idling in drive (<1000rpms) in the muffler and am thinking about replacing it with either a magnaflow or hooker. I am pretty sure a piece of my cat brick broke off when I bottomed out a while back. That is assuming it will weld up with my existing setup which I think is flowmaster.
Old 02-03-2009, 06:58 AM
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I have a magnaflow catback forsale lol
Old 02-03-2009, 06:59 AM
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How did you get that SLP build number for your WS6?
Old 02-03-2009, 08:05 AM
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I called SLP and asked. They just needed my VIN and told it to me.
Old 02-03-2009, 06:21 PM
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When did you call? Because everywhere I have seen they have no records of the LT1 WS6 cars.
Old 02-03-2009, 07:39 PM
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in his sig it says 2000 WS6
Old 02-03-2009, 07:52 PM
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Looks like it says 1996 to me.
Old 02-03-2009, 07:57 PM
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Originally Posted by 94Z28rag
Hooker catback w/ cutout.

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Agreed. Hooker is where it's at.

It's cheap, tips look good, great sound. Nice and docile at idle, screams under throttle.
Old 02-04-2009, 08:50 AM
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I called SLP a few months ago...maybe Oct '08? I don't remember exactly. When I called them you get an automated menu and one of the options was something about a SLP registry. I chose that option and the woman that answered just asked me for I think the last 8 or so numbers of my VIN and told me the month and build number for my car. Only took a few minutes.

Ok, I just called SLP again this morning at 732 349 2109 and at the menu choose '0' for customer service. I spoke to the lady again and she said that they don't have complete records for the WS6s only the firehawks; however, she looked up my VIN and said "Oh, we do have records for your car." Then she told me my build number.

So I would call them and maybe you're one of the lucky ones whose number is on file too. Good luck!
Old 02-04-2009, 09:27 AM
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Originally Posted by Spiers
Looks like it says 1996 to me.
Whoops looked at the wrong sig



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