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

Magnaflow mufflers???

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Old Sep 24, 2007 | 06:44 PM
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Default Magnaflow mufflers???

ok guys....its like the title says...im looking for a sound difference and performance gain. Magnaflow makes a direct fit muffler for my 94 Z. What do you guys think?? If you know some other brands that ya'll have used please suggest them.thanks
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Old Sep 24, 2007 | 10:17 PM
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magnaflows suck.. GEt SLP or Borla those are good.
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Old Sep 24, 2007 | 10:23 PM
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well...i dont really like borla...a friend of mine had it on his camaro and he hated it...and the slp kits sound way too raspy for me. i just like a deep melow tone but loud at WOT.
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Old Sep 24, 2007 | 10:26 PM
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Originally Posted by Bad_tx_Z28
i just like a deep melow tone but loud at WOT.
Then magnaflow is for you...I've got magnaflows on my duals (i know....different setup) but they are really deep at idle, and scream pretty good at throttle. A buddy of mine has a Magnaflow catback on his 97 TA and it sounds great, pretty mellow driving around until you get on it.
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Old Sep 24, 2007 | 10:30 PM
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go for the magnaflow.. i have their cat back and i love it.. its a nice deep tone and sounds nasty at WOT
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Old Sep 24, 2007 | 10:54 PM
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sweet!! im not getting the catback system...i called magnaflow and they sell the direct fit muffler itself for 103 bucks shipped to my door.
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Old Sep 24, 2007 | 11:27 PM
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I did the same thing for my flowmaster, but the one thing you have to realize is a cat back is most likely a 3 inch pipe where the stock is a 2.5'' pipe. So your just choking down your hi-po part.One thing Ive learned, by doing it also, not to do is cheap out. It cost more in the long run. My flowmaster 80 series $90 + $100 for the weld + $50 for the tips. thats $330 the same price as a magnaflow cat back, and I dont even have the 3'' piping, dammit!
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Old Sep 25, 2007 | 09:11 AM
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well i lucked out...i have a factory 3" catback with 2.5" tips...i can get a direct fit muffler from magnafow.
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Old Sep 25, 2007 | 12:07 PM
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you have a factory 3 inch system?? I believe all systems were 2.5 werent they
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Old Sep 25, 2007 | 02:15 PM
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Originally Posted by 3pnt4maro
you have a factory 3 inch system?? I believe all systems were 2.5 werent they
thats what I thought.
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Old Sep 25, 2007 | 02:47 PM
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Originally Posted by 98_WS6
magnaflows suck.. GEt SLP or Borla those are good.
They don't suck, and I'd rather have Magnaflow over Borla. I do love my Loudmouth though.
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Old Sep 25, 2007 | 03:00 PM
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well i dont know if its factory, but ts definatley a 3" caback. i just need a better muffler
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Old Sep 25, 2007 | 03:10 PM
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Magnaflows are great. I run their 3" dual muffler coming off LT's on my catless x-piped TD's, and it sounds awesome at idle and SCREAMS at wot. I have a sound clip hosted if you would like to hear it.
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Old Sep 25, 2007 | 03:14 PM
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Magnaflow is awsome. BTW factory exhaust is 2.75 inches.
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Old Sep 25, 2007 | 05:04 PM
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Default Sounds great!

To reiterate, the stock exhaust is 2.75". I did the same thing you're thinking about doing and it worked out fine and sounds great. Part No. 12267, with the 3" inlet/2.5" outlet. Here's a link at how it sounds:

http://www.lt1engine.com/soundlib/magnaflow.html
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Old Sep 25, 2007 | 07:09 PM
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cool man thanks for the link. so im guessing you just flared the main pipe to 3inches to fit on the muffler. yeah im definatley gonna get it. how much of a gain did you see?
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Old Sep 25, 2007 | 07:39 PM
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Go with the Magnaflow you will like it, with LT's and No Cats it reallyyyy woke it up. Its tame and deep under normal driving but when you get on it its pure hell from the outside.
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Old Sep 25, 2007 | 07:52 PM
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Originally Posted by Bad_tx_Z28
cool man thanks for the link. so im guessing you just flared the main pipe to 3inches to fit on the muffler. yeah im definatley gonna get it. how much of a gain did you see?
No prob.

As far as the install, I had a muffler shop do it. The 3" input on the muffler should slip right on the 2.75" stock pipe, with a little welding/clamping.

As far as gain...I really can't tell a "seat of the pants" difference, but I don't have a true CAI, so that could be the reason why. I did it mainly for sound. Supposedly unless you go with a CAI, LT's and either no cat or hi po cat, there's not a really big gain, if any.

But the sound...nice...so it was worth the $100.
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