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Making a stock ls1 exhaust sound better

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Old 04-29-2010, 12:00 PM
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Well, i've never cared for flowmaster much either. On the other hand ive never been a fan of the extreemly muffled stock. I'm pretty sure i wont mind actually hearing the engine now.. I wanted to get a catback loudmouth, but thats just gunna have to wait. muffler<catback<true duels<$$$$
Old 04-29-2010, 02:27 PM
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Single chamber

http://www.youtube.com/watch?v=bcZGEd0AYDE

http://www.youtube.com/watch?v=DNmnWZiXXfo
Old 04-29-2010, 02:34 PM
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Buddy has a flowmaster catback on his 02 TA...i think it sounds just fine.
Old 04-29-2010, 02:37 PM
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i put a cutout in the intermediate pipe on my old 2000 WS6 and it sounded pretty good and that was on the stock exhaust
Old 04-29-2010, 04:24 PM
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You can do an el cheapo borla by conecting I pipe that goes to the muffler to the pass. tail pipe. Did this back in 99' when alot of mods were not available just had a muffler shop cut a hole and weld a peice of pipe in.
Old 04-29-2010, 09:54 PM
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Got it installed. Its way better than stock sounds deep and clean. Its not as loud as a full cat back but i like the stock tips, the cats are gutted, and the guy before me put in a replacement y-pipe so i feel like theres not really any difference. I noticed the throttle seemed more responsive, either it does actually increase the flow that much or im not uncomfortable to step on it and hear the high reving stock exhaust..either way im much happier for now
Old 04-29-2010, 10:40 PM
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Whatever anybody else wants to say ... I generally hate the way Flowmasters sound, but flow notwithstanding, the FM 80 sounds great on f-bodies. Glad you like it.
Old 05-02-2010, 09:53 PM
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I had the FM 80 put in the stock catback years ago, it's sitting in the bottom of a landfill somewhere now. I think they sound good on LT1s but weak on the LS1s.
Old 05-03-2010, 08:43 PM
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ok stop raining on my parade. haha. Ya i know its not perfect, but i couldn't beat a cheap fix to a soundless machine! I'm acutally pretty content right now, even though i know what i want in the future.
Old 05-08-2010, 08:50 PM
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Flowmaster showed a drop off 5-8 HP on the dyno sheet ... Stay with the old style magnaflow 3" series .... btw .... IMO electric cutout's will satisfy ur need's quite with ur stock muffler , can adjust how loud you want it to be with a switch =} heaven in your car is a SWITCH AWAY .... E-CUTOUT'S +10 ... IMO ONLY !!
Old 05-10-2010, 01:19 AM
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Originally Posted by Reaperchild
Flowmaster showed a drop off 5-8 HP on the dyno sheet ... Stay with the old style magnaflow 3" series .... btw .... IMO electric cutout's will satisfy ur need's quite with ur stock muffler , can adjust how loud you want it to be with a switch =} heaven in your car is a SWITCH AWAY .... E-CUTOUT'S +10 ... IMO ONLY !!
I don't for a minute believe that a FM drops hp over a stock muffler
Old 05-10-2010, 05:37 AM
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I have flowmaster on my iroc and it sounded amazing with full exhaust and headers so I got just the muffler for my 01 z28 and to be honest it was a bit too quiet for what I thought it would be in comparison.


It does sound good in my opinion and the bolt ons for the induction have made it sound and run better.


I just bought pacesetter headers and y pipe off ebay, going to try to get a magnaflow catback and see what I think of it, might get the flowmaster catback also on there right now.

Theres so many people that say flowmaster is bad blah blah but really they do flow pretty good and sound good, their construction isnt the most beautiful but it works. It flows better than the stock muffler causing pressure differences enough to create popping sounds depending on how you drive.


btw installed my flowmaster muffler was $200 the budget shop was $160 but my friend had issues with them just for an idea of cost here?
Old 05-10-2010, 05:42 AM
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Just to add and ask if someone might enlighten me on the subject does the car have to be tuned after deleting cats, im not sure what has to be done to avoid the check engine light or service engine soon lights, thanks



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