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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 06-19-2013, 07:40 PM   #1
Skogen
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Headers w/Stock Exhaust

Thinking awful hard about doing headers with high flow cats on my Camaro (LS3 Car).
I do not hate the sound of the exhaust now, i rather prefer the "sleeper" status so every ricer leaves me alone. I have been told the dynatech cat back exhaust is very quiet also, what are the gains from switching it out vs. the factory? Is it worth the $$$ to go aftermarket knowing this?

The setup I was considering is: Headers (probably dynatech) with high flow cats & a set of noweeds exhaust cutouts.

Suggestions?
Does anybody have a clip of a similar setup?

Thanks
BS

Also, this setup with a CAI will require tuning. Suggestions? Montana does not have much for performance shops for a dyno tune.
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Old 06-19-2013, 07:46 PM   #2
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There is not much performance benefit to a cat back on these cars until you get into BIG HP numbers. It is mostly going to be about sound and weight reduction. You can have the tuning done remotely.
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Old 06-19-2013, 10:34 PM   #3
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If you want to keep it quiet, keep the factory exhaust. It'll be a quiet idle and cruise but loud when you get on it. The factory mufflers look big and restrictive but its not the case.
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Old 06-19-2013, 10:39 PM   #4
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I have the magnaflow comp series exhaust with SW headers and its pretty quiet for me. No drone inside and barely hear it unless it WOT. People always compliment me in the sound.
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Old 06-20-2013, 09:40 AM   #5
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I think that LT headers and the stock exhaust is one of best sounding setups. I had this at one time, but I blew a baffle in one of the stock exhausts (caused by the LTs?), and had to go aftermarket.
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Old 06-20-2013, 09:44 AM   #6
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You will gain the most power with a full exhaust system. But, for the "sleeper" sound this setup would gain you some good hp and keep it quiet. Check out a Kooks Header vendor on this site for some great deals on our headers.
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Old 06-20-2013, 09:59 AM   #7
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LTs and stock exhaust is not quiet at all. Do a search. It sounds awesome, and it cuts down on the drone that you get with most aftermarket mufflers.
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Old 06-20-2013, 10:22 AM   #8
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Quote:
Originally Posted by Skogen View Post
Thinking awful hard about doing headers with high flow cats on my Camaro (LS3 Car).
I do not hate the sound of the exhaust now, i rather prefer the "sleeper" status so every ricer leaves me alone. I have been told the dynatech cat back exhaust is very quiet also, what are the gains from switching it out vs. the factory? Is it worth the $$$ to go aftermarket knowing this?

The setup I was considering is: Headers (probably dynatech) with high flow cats & a set of noweeds exhaust cutouts.

Suggestions?
Does anybody have a clip of a similar setup?

Thanks
BS

Also, this setup with a CAI will require tuning. Suggestions? Montana does not have much for performance shops for a dyno tune.

If you can deal with looking at the ugly cans from the back end it's a great set up. You will gain all the power by adding the long tubes. Like others have already said, you won't gain anything by swapping out the catback. Toss in a set of cut outs to wake things up if you're ever in the mood. If this sounds like something you're serious about I'd also recommend the ARH "long system". The long system runs all the way to the rear axles and will remove the factory H-pipe (with an X-pipe) and the resonators. If you do add headers then you should get a tune although you really won't be harming anything by waiting a bit, you just leave a good amount of power on the table.
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Old 06-20-2013, 10:36 AM   #9
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Well, I plan to do the cat back at sometime.

Just trying to budget by build. I dont finance toys so... Just dont want the car to sound like crap during the process.

Headers 1 7/8 or 2' primaries/Noweed's and probably a CAI are probably what I am initially looking at.

Eventually I will do some suspension upgrades, cat back and possibly a maggie.

So I prefer my parts to work later in my build vs. having to replace them once I add forced induction.

Thanks
BS
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Old 06-20-2013, 10:49 AM   #10
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Love My LTss in to HF's out the factory cat back!!! Yep it's cammed too

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Old 06-20-2013, 10:58 AM   #11
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Quote:
Originally Posted by Skogen View Post
Thinking awful hard about doing headers with high flow cats on my Camaro (LS3 Car).
I do not hate the sound of the exhaust now, i rather prefer the "sleeper" status so every ricer leaves me alone. I have been told the dynatech cat back exhaust is very quiet also, what are the gains from switching it out vs. the factory? Is it worth the $$$ to go aftermarket knowing this?

The setup I was considering is: Headers (probably dynatech) with high flow cats & a set of noweeds exhaust cutouts.

Suggestions?
Does anybody have a clip of a similar setup?

Thanks
BS

Also, this setup with a CAI will require tuning. Suggestions? Montana does not have much for performance shops for a dyno tune.
Doing headers with the stock exhaust is a great cost effective way to add power and sound. You will not gain much HP wise with a catback system, but the weight savings and tone change are the reason most do it.
Quote:
Originally Posted by Kooks Headers View Post
You will gain the most power with a full exhaust system. But, for the "sleeper" sound this setup would gain you some good hp and keep it quiet. Check out a Kooks Header vendor on this site for some great deals on our headers.
Feel free to call, PM or email us anytime with questions!

Best regards,

Tyler
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Old 06-20-2013, 11:18 AM   #12
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Quote:
Originally Posted by RogerBzSS View Post
Love My LTss in to HF's out the factory cat back!!! Yep it's cammed too
...
You would love a set of cutouts. Cutouts, LTs, and a cam sounds like a demon.
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Old 06-20-2013, 11:21 AM   #13
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Why not just remove the mufflers and run catless with LTs? Why do it part-time with cutouts? BORING! :P

Also, cutouts are added cost, added work, and one more thing to fail on the car.
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Old 06-20-2013, 11:25 AM   #14
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Quote:
Originally Posted by ForgedReality View Post
Why not just remove the mufflers and run catless with LTs? Why do it part-time with cutouts? BORING! :P

Also, cutouts are added cost, added work, and one more thing to fail on the car.
phone calls, drone and neighbors

there will be a time that you want to tone it down. Trust me... I do it every day.
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Old 06-20-2013, 12:41 PM   #15
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You can always paint the factory mufflers black, they all but disappear under the car then.
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Old 06-20-2013, 01:27 PM   #16
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Keep the factory exhaust, unless you get concerned about weight, then get a set of quiet mufflers.\

+1 on painting the mufflers black
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Old 06-20-2013, 01:29 PM   #17
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Oldie but goodie...

DTH LT's with Stock Catback.

Forgive the video...prolly as old as Camaro5 itself. LOL

Always the most simple and cost effective way to make power and sound good doing it. Let us know when you're ready!

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Old 06-20-2013, 01:33 PM   #18
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Quote:
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i rather prefer the "sleeper" status so every ricer leaves me alone.
yeah, it wont matter....plenty of ricers out there that will still want to race you.
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Old 06-20-2013, 02:27 PM   #19
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Yep I used Hi Temp 1500 Degree Plastik-Coat Paint makes the OEM Cans dissappear
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Old 06-20-2013, 03:16 PM   #20
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I did the same thing and was surprised just how good the stock catback actually sounds. Here's a before...



And after (including blacking out the mufflers)...



My mods included a cam but I think you can get an idea what it sounds like.
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Old 06-20-2013, 03:52 PM   #21
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Fantastic!

Thanks!
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Old 06-20-2013, 10:45 PM   #22
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I am pleased with the stock mufflers, Dynatech long tubes, and hiflo cats. I have posted some crappy vids on here. So far, haven't blow out the stockers and have been on the track several times. Mine is lowered so I haven't bothered to pain them.
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