Hammy Thomas

Evo_Joe

I think people tend to lean towards the Corsa/Akropovic when they are partial to the euro-type exhaust sound, as opposed to the outright obnoxious guttural sound you could achieve w/ b&b bullets or borla atak. The aftermarket ones that aren't corsa/akro tend to have drone though, so there's a bit of give and take, as far as what sound you want to achieve and how much drone you can put up with. I suppose you could always have them open the muffler up and mod them, but they're going to be hard to sell after that, and you may not even get the sound you want. Instead of throwing good money after bad, try to find a local vette meet and sit in and hear some of the other exhausts that are out there. Once you find what you want, try to swap or sell yours maybe.

SPSandman

What Intake do you have on it? Stock? You could change the sound a bit with a CAI. Or upgrade to a Cat back system to get the bigger pipes as well.

Buddy just put the same axle back on his 2008 and my 2015 2SS sounds a good bit better, but mine is a cat back system and I also have a CAI. He is strictly stock minus the axle-back. He is getting an intake next, so will be interesting to see how it changes his sound.

farmington

Hammy Thomas

Sid1231987

saplumr

SPSandman

My car is quite a bit louder than his car. My car still has the stock cats on so the cat back just included larger 3" pipes than the stock (I think 2.5") and also removed the big stock "diffuser" that is in the middle of the stock exhaust. The Cat Back system replaced that with an X-Pipe. His is strictly axle back XTreme and nothing else as mine also has a Cold Air Inductions CAI. So with my L99 and his LS3, mine was definitely louder and throatier. Mine has a tune as well which may also have some effect on it as well, but probably not much sitting in their parking spots. Think that is mostly noticeable with the shifts and disabling of AFM.

cv67

CAI wont change exh note unfortunately.
Cam timing, compression, headers.

itomh

I don't see your location in your profile, but I will assume that during the winter your car won't be driven. With that said, I would take exhaust off and sell it during the winter months and buy or swap for something louder like the B&B Bullets or Borla Atak. Be warned, you may regret the drone.

NormWild

I have headers, no cats, and Corsa Xtreme. This is probably the loudest set up available outside of dumps and/or no mufflers. Adding headers would be the next step to make it louder, followed by removing the cats. Keep in mind, you must tune it to remove any emissions components.

Hammy Thomas

saplumr

I'll respectfully disagree on headers making the a bigger sound difference than the offroad x.

Naldinator

Yup. AR headers and mid pipe then Cutouts with stock catback is the best.

Shikaitsu

What is the reason for not wanting to get headers? Is it a price thing or emissions testing? There are some reasonably priced headers out there that will get the job done. Alternatively, assuming price is the issue I pulled my factory cats off and gutted them with a pry bar as a temporary solution and it got quite a bit louder. I didn't buy headers because I knew sooner rather than later I was going turbo and didn't want to put money into any mod that I would have to get rid of. The car was tuned right after to remove the code for the lower O2 sensors.

cgladish

California does not allow L/T headers. feel that they put the o2 sensor too far down stream, not letting them operate in the proper temp. range. while I agree with the logic, not sure that I agree with the results. the state is getting tougher on all emission related equipment. one shop even questions the fuel injectors ( not stock 'color' ) on my '98 Z28.
I do envy other states that have a 'bit' more freedom on add-ons. but at the same time, I guess it's good to have a good performing car that still runs clean too.

LMB-Z

If you want it louder, just simply remove the exhaust. I promise, it will be LOUD!!!. Other than what has been said, thats the only way, besides putting on a different axle back.

Shikaitsu

I'm lucky enough to live in a state that has no emissions testing so anything goes. My first car had a single turbo that dumped the exhaust right out the passenger side of the front bumper. This also means your average car features about half a dozen 1000 whp builds in anything from Vettes, Supras, R32 GTR's, you name it. It makes the car scene around here pretty expansive.

cgladish

actually, let me correct my previous statement. it's not the o2 sensors that are the issue. it's the cat's.
the problem I have with the states position is that, even with the change to shorty headers, the cat's were still
mounted in the same postion as they were, with the long tube headers. the cat's can only be mounted in one spot
( as defined by the performed position in the car frame/body ). when using the shorty's, we had to use a short section of pipe to make up the difference from the long tube headers. so in basically, the cat's would always be in the same spot, regardless of the length of the headers. by the way, the car in question ( '98 Z28 ) ended up passing the emission with almost no NOX.

NormWild

OK, I'll defer to those that have done it in three steps. I was thinking more in line of performance gains while increasing volume. I did my cat back first then did headers and off road X at the same time.