exhaust/air intake upgrades - LS1LT1 Forum : LT1, LS1, Camaro, Firebird, Trans Am, Engine Tech Forums
 
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post #1 of 15 (permalink) Old 10-13-2009, 03:50 PM Thread Starter
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exhaust/air intake upgrades

Hello everyone,
I got a 98' firebird last summer, 3800 V6 and I am looking to put some money into upgrading it this year. The problem is I am having trouble deciding between some things and I have a few questions.
I am gonna get a catback exhaust and cold air intake but idk what cat back to get. I am stuck between a Borla and a Magnaflow but i am unsure which one is best. If anyone has any suggestions let me know.

Thanks,
PBendel
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post #2 of 15 (permalink) Old 10-13-2009, 04:19 PM
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On my 98 V6 Firebird I had A Flowmaster 80 series.. It sounded bad ass till 3000rpms. I think the Flowmaster with headers and a full 3inch exhaust with High flow cat sounds damn good on a 3.8.. when I did heads and cam it really made my car sound more like a Lt1.. But Flowmaster is not the best performance exhaust out there.. I was looking for the best sounding exhaust and flowmaster was it. The best performance exhaust is probably a SLP Loud Mouth.. hope this helps.. Check out

www.thunderracing.com
www.firebirdv6.com
www.intense-racing.com

Jeff
2002 WS6 T/A with bolt ons
1995 Firehawk #599
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post #3 of 15 (permalink) Old 10-13-2009, 04:53 PM
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I'd do the Magnaflow myself.

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post #4 of 15 (permalink) Old 10-13-2009, 06:35 PM Thread Starter
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ok, I was thinking about going with Borla or Magnaflow, my buddy said that flowmaster sounded to ricey, idk i will check them out more. Borla has dual quad exhuast and supposidly is the best but im not sure?
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post #5 of 15 (permalink) Old 10-14-2009, 12:54 AM
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I remember from testing with cut outs Borla and Magnaflow both showed small gains with an open cut out. I'm just not a fan of Fart mouth er Loudmouth. Either way pretty much anything you get you'll pick up power over the chokemaster. Got you and the first replier mixed up.

Mr. Black Angus
01 PT Cruiser (beater for now)
03 GTP Stock I swear
13.464 @ 103.51 mph spinning a lil Totaled 9/25/2010
LSx> L67> Cross Fire> LTx
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God said, let there be light, and the optispark was born...and he saw that it was bad.
Quote:
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Lt1's suck.
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post #6 of 15 (permalink) Old 10-14-2009, 12:15 PM Thread Starter
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Well along with power i am also looking for the deep rumble sound. I have checked on videos online and it seems like Borla has the deepest sound followed by magnaflow and then Flowmaster. I am just wondering which one you would recommend for a 3.8 L V6 that gives both performance and the best sound. Money is not an issue.
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post #7 of 15 (permalink) Old 10-14-2009, 02:33 PM
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Either the Borla or MAgnaflow is what I'd go with.

Mr. Black Angus
01 PT Cruiser (beater for now)
03 GTP Stock I swear
13.464 @ 103.51 mph spinning a lil Totaled 9/25/2010
LSx> L67> Cross Fire> LTx
Quote:
Originally Posted by Grims View Post
God said, let there be light, and the optispark was born...and he saw that it was bad.
Quote:
Originally Posted by sweetbmxrider View Post
Lt1's suck.
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post #8 of 15 (permalink) Old 10-14-2009, 02:34 PM Thread Starter
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Is one better than the other?
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post #9 of 15 (permalink) Old 10-14-2009, 02:37 PM
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I'd go with Magnaflow myself in a new vs new scenario since it's cheaper. If you can find a good deal on a Borla then go that route if you wish

Mr. Black Angus
01 PT Cruiser (beater for now)
03 GTP Stock I swear
13.464 @ 103.51 mph spinning a lil Totaled 9/25/2010
LSx> L67> Cross Fire> LTx
Quote:
Originally Posted by Grims View Post
God said, let there be light, and the optispark was born...and he saw that it was bad.
Quote:
Originally Posted by sweetbmxrider View Post
Lt1's suck.
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post #10 of 15 (permalink) Old 10-14-2009, 02:43 PM Thread Starter
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ok thanks alot
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post #11 of 15 (permalink) Old 10-23-2009, 02:19 PM
 
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I have a Borla adjustable on my car currently. Also have 3" all the way back to a high flow Magnaflow catalytic converter and Clear Image Automotive headers. Sounds great with a full block off plate in the adjustable section.

It didn't sound perfect when I was tinkering with the exhaust though. I had different pipe sizes on the way back with the stock cat, and log manifolds etc. I had major rasp at higher RPMs.

If you're just buying the cat back exhaust and don't plan on doing all the way up to the motor, then I've heard Magnaflow is the best way to go.

Flowmaster sounds great from what I've heard, but doesn't flow well...(ironically)

Last edited by Namrepus28; 10-23-2009 at 02:27 PM.
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post #12 of 15 (permalink) Old 10-23-2009, 02:53 PM
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Flowmaster sounds good at idle on the series 2, but once you hit 3k rpm like mentioned above it starts to sound like rice.

I wouldn't put flowmaster on anything but a show car where sound quality is the primary objective.



Yep its slow.

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post #13 of 15 (permalink) Old 10-23-2009, 05:01 PM
 
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Mine has flowmasters and doesn't sound like rice, atleast I don't think so..

http://www.youtube.com/watch?v=Zov7O7693vo

That old clip I did when I did my valvetrain, skip to the end when I accelerate off, sounds good to me...
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post #14 of 15 (permalink) Old 10-25-2009, 03:24 PM Thread Starter
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Yeah but urs is a V8. Mine is a V6.
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post #15 of 15 (permalink) Old 11-10-2009, 12:32 PM
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I have the same magnaflow too and love it, you can usually get a used one on ebay or cragislist. I wanted a valid warranty so I got it here. Magnaflow 36265. Also some of the forum sponsors selling magnaflow usually have a sale going on. Either way its a great cat, sounds great, and very easy to install.
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