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Ok. I am thinking about getting a new cat to replace the OEM one. Would you guys recommend the 2.5" or the 3". I was thinking of going with the Dynomax Super Converter. Please let me know what you all think. [img]graemlins/burnout.gif[/img]
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<b>.::[ 0 ]::.</b><br /><b>1997 Camaro 3800 II M5</b> (30th edition)<br />[]B&M Ripper Shifter<br />[]Proform Shift Light<br />[]SLP Cold Air<br />[]Dynomax Exhaust<br />[]Richmond 3.73\'s<br />[]Zexel-Torsen LSD<br />[]180* Thermostat<br />[]Tail Blackouts<br /><a href=\"http://photos.yahoo.com/skyracer_x\" target=\"_blank\">pics</a> -
The stock cat is a 3" inlet with a 2.25" outlet. I would recommend using a replacement with a 3" inlet, as it will be easier to install.1997 Y87 Camaro with a motor and some stuff. -
if I were going to do that I would just go ahead and go with a 3 inch exhaust all the way back, just let an exhaust shop bend it for ya.. I konw there are alot of arguments out there about 2.5 vs 3 inch so that's just my $.02-Brad
98 Firebird - gone from mod mode to keep it running and useable mode.
2000 V-Star Custom 1100
If all else fails use a bigger hammer!
:rock:Comment
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<blockquote>quote:</font><hr>Originally posted by black98V6:
I konw there are alot of arguments out there about 2.5 vs 3 inch so that's just my $.02<hr></blockquote>
That's why I went with the LS1 2.75" pipe, Right in the middle
:D1996 Y87 Camaro, 175.0 rwhp, 211.6 rwtq.....1/4 15.500@88.54 <----- Needs work!!<br />-CAI, Custom bent S-Pipe, LS1 I-Pipe, Flowmaster 80 series, !MAF, manual fan switch, relocated trunk pop switch, 180 degree t-stat, More to come!<br /> <a href=\"http://camaro.wbisolutions.com\" target=\"_blank\">http://camaro.wbisolutions.com</a> <p>WANTED!!! Naked and handcuffed!Comment
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so you went with a 3" cat and 2.75" for the piping? Thats what I planned to do. Get a 3" cat and keep my 2.5" pipes. [img]graemlins/burnout.gif[/img]<b>.::[ 0 ]::.</b><br /><b>1997 Camaro 3800 II M5</b> (30th edition)<br />[]B&M Ripper Shifter<br />[]Proform Shift Light<br />[]SLP Cold Air<br />[]Dynomax Exhaust<br />[]Richmond 3.73\'s<br />[]Zexel-Torsen LSD<br />[]180* Thermostat<br />[]Tail Blackouts<br /><a href=\"http://photos.yahoo.com/skyracer_x\" target=\"_blank\">pics</a>Comment
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I'm due in for replacing my cat too. Right now I just have a Dynomax with 2.5" tails (muffler back) i've been considering on how to do this. Replace my Y-pipe (i have a pinging sound sometimes) hi flow 3" inlet cat 3" outlet, followed by a cutout, and do 3" from the cat back to the muffler then put a 2.5" adapter to go into the mufflr and just leave the tails 2.5". Are 3" tails really going to make a differece? I'd be a pain in the *** and look stupid with the adapters on them, lol. Would it run better with 3" cat back or should i leave it with 2.5" the size of my muffler, any opinions?
TedComment
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Well I think that besides the cat, 3" piping would be alittle to big and make your car lose back pressure. I think 2.5" should be sufficient. [img]graemlins/burnout.gif[/img]<b>.::[ 0 ]::.</b><br /><b>1997 Camaro 3800 II M5</b> (30th edition)<br />[]B&M Ripper Shifter<br />[]Proform Shift Light<br />[]SLP Cold Air<br />[]Dynomax Exhaust<br />[]Richmond 3.73\'s<br />[]Zexel-Torsen LSD<br />[]180* Thermostat<br />[]Tail Blackouts<br /><a href=\"http://photos.yahoo.com/skyracer_x\" target=\"_blank\">pics</a>Comment
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you gain more HP with less back pressure but you lose low end torque.
There is a balance on every motor as to how extreme you should go, exhaust mods should usually be done in a moderate fashion.
A 3in 3out Cat would help improve flow greatly as well as getting rid of the stock s bend coming out of the cat.
The less curves the more flow even a single outlet muffler is better than a dual outlet muffler.Comment
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I have also heard the with the 6's, you need a little back pressure (unlike big bother). I don't think I would bother with the 3'off the cat, the 2.5' should be sufficient. However, the 3' tailpipes could modify the exhaust note resinence and give it a low "throaty" note. Post your decision and which product you end up using. I have good experience with SLP, and a buddy of mine has used Borla and Flowmaster (on two different Camaros), both with a good sound. (He liked the Borla more, but Flowmaster is a little less expensive and acording to him"gives more bang for the buck."1997 Camaro. Lingenfelter Super Tube CAI. Flowmaster 80 series w/ dual out.Comment
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You do know I am just talking about the cat itself right?!? Not the whole muffler.<b>.::[ 0 ]::.</b><br /><b>1997 Camaro 3800 II M5</b> (30th edition)<br />[]B&M Ripper Shifter<br />[]Proform Shift Light<br />[]SLP Cold Air<br />[]Dynomax Exhaust<br />[]Richmond 3.73\'s<br />[]Zexel-Torsen LSD<br />[]180* Thermostat<br />[]Tail Blackouts<br /><a href=\"http://photos.yahoo.com/skyracer_x\" target=\"_blank\">pics</a>Comment
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