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hey people, the guy at the muffler shop said that there is not point for me to go 2.75" from my cat outlet wich is 2.25, back to my muffler witch is 2.25 in/out, he said that its the muffler that is doing the resticting, so if i wanted to go 2.75 from the cat i would have to change my muffler. :mad:
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99 Firebird Vert, Pewter Metalic<br />Fast Toys Ram Air<br />Jet Stage 2 Chip<br />17x8 Mille Miglia Emotion II Plus\'<br />wrapped in 245/35/17 Yokohama A520<br />Rhino Perf. Exhaust<br />K&N air filter<br />check pics at:<br /><a href=\"http://www.fastrides.com/members/v6birdy/\" target=\"_blank\">http://www.fastrides.com/members/v6birdy/</a> -
There is no point because it would just be 2 bottle necks. One at the cat, and one at the muffler.
If thats what you really want to do then I'm sure the shop will do it for you. But you will not gain again by just increasing the I-pipe size, unless you have a aftermarket muffler.
Without replacing the cat you will always have the bottle neck of going from 3 inch in to 2.25 out. Probably the best suggestion is to get a 3 inch high flow cat so you only go 3 inch to 2.75 inch.Keith - 99 'maro - White M5 - bumpstick and boltons - 13.65 @ 101 N/A
"I ain't too big to listen to the rumors, I'm just too @#$% big to pay attention to them" - Dr. Dre
http://seppo.hopto.org/ -
get a cut out!
I have a 97 bird and I just got a high flow cat w/ 3" piping to the cutout thats mounted right before the rear axle. And the high flow cat and cut out are 3" in and out. and after the cut out the guy at the muffler shop fabricated the 3" back down to the stock 2 1/4 ". So it can be done.Big cam. Big stall. Big nuts.<br /><br /><a href=\"http://www.streetlethal.net/vids2/joenastycam.MPG\" target=\"_blank\">Idle/Rev Clip.</a>Comment
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<blockquote>quote:</font><hr>Originally posted by 99firebirdconv.:
so if i wanted to go 2.75 from the cat i would have to change my muffler<hr></blockquote>
Umm... yeah. You wanted flow right? You plan on flowing with a custom I-pipe and a factory muffler?\'94 Camaro 3.4<br />\"No, Starvin Marvin. That\'s my pot pie.\"Comment
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Yeah, they told me the same thing. I was disappointed at first, :( but now I'm glad that I did. :D Just don't buy one of those no name junk mufflers from the muffler shop. Get a dynomax(my personal favorite), flowmaster, spintech, etc.<b>1998 Firebird 3800 Series II, A4</b><br />Direct-Flo Lid,K&N Filter,DEE TB Spacer,TPS-TEC,ZZP Mini-AFC,Raised and Cutout Airbox 7mm,BMR STB & Boxed LCAs,KYB AGX Shocks,Drilled/Slotted Rotors,180* Thermo,2.5\" Catco Cat,Dynomax 2.75\" custom catback,Kumho Ecstas/245,Jet Stage 2,3.42,Edge Racing 2870 Stall,B&M Tranny Cooler,B&M Deep Tranny Pan,LSD,AAM Girdle,1LE DS,NX Wet Kit,MSD DIS-4,MSD Blaster Coil Packs,Taylor Spiro Pro 8mm Wires,NGK TR6\'S gapped .045,ZZP UD WP Pulley,SLP Fan Switch,TT II\'s<br />N/A: 15.6342 @ 88.44 (On stock converter. Strugglin\' to beat it.)<br />Nitrous 50 Shot: 14.7463 @ 93.49Comment
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a have an aftermarket muffler, Rhino, i paid a nice chunk of money for it back in the day, but i guess i gonna have to change it if i want bigger tubing. :(99 Firebird Vert, Pewter Metalic<br />Fast Toys Ram Air<br />Jet Stage 2 Chip<br />17x8 Mille Miglia Emotion II Plus\'<br />wrapped in 245/35/17 Yokohama A520<br />Rhino Perf. Exhaust<br />K&N air filter<br />check pics at:<br /><a href=\"http://www.fastrides.com/members/v6birdy/\" target=\"_blank\">http://www.fastrides.com/members/v6birdy/</a>Comment
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alot of you say go with 3" hi flow cat and if you talk to the faster guys, james and keith they use 2.5" hi flow cat and 2.5" off road pipe.
[ May 05, 2002: Message edited by: bluecmaro96 ]</p>Comment
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