2005 Corvette Exhaust... What to get?
08-09-2010, 05:41 PM
#21
Burning Brakes
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08-09-2010, 10:28 PM
#23
I have a 2005 Coupe 6 speed manual and I put Corsa Sports on my car. I was at Bloomington Gold and was able to hear a number of systems before I decided. I realy like my system. It is loud when you jump on it but normal otherwise.
08-09-2010, 10:52 PM
#25
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Hey guys, my name is Mike and I just signed up today for Corvette Forum. I am a new owner of a 2005 LeMans Blue Corvette C6 and want put on some exhaust. Im looking at the SLP Loudmouth ll, but I am confused about its specifications. On the SLP site it says it comes with "mufflers", but on the Mid America Moterworks Corvette site it says it comes with "resonators". Since I live in North Carolina, which requires mufflers on vehicles, I am stumped about which site to buy from. Can I use my stock mufflers with the new pipes?
- Mike,
I'm open to all suggestions about other exhaust systems as well.
- Mike,
I'm open to all suggestions about other exhaust systems as well.
08-10-2010, 06:32 AM
#27
I just did one of the muffler mods to my stock C6 mufflers. simply drilling 1" hole in outside wall of muffler and then 3/4" holes thru the exit pipe before it leaves the muffler, then sealing the 1" hole with plug or sheet metal, gives nice rumble with no drone. Can now hear the motor running.
A lot of the after market mufflers add drone and excessive noise for cruising. Do a search on muffler mods here will bring the details. pretty simple fix for minimum costs.
A lot of the after market mufflers add drone and excessive noise for cruising. Do a search on muffler mods here will bring the details. pretty simple fix for minimum costs.
08-10-2010, 07:25 AM
#28
Instructor
NPP all the way! I had Bassanis on my 2005 coupe and there were many times I wished I could have taken them off...mainly highway driving. I have NPP on my 2006 vert and love them. I turn the mild to wild switch off for highway driving and late night driveway approaches. The rest of the time they're on and loud!
08-10-2010, 09:04 AM
#29
Safety Car
For everyone complaining about drone - in many cases (depends on what you're calling drone) it can be eliminated without swapping out the exhaust.
If you're defining drone as just a loud constant sound from the exhaust, then it may be just the exhaust, and yeah, you've got to get rid of the exhaust.
But if the drone is a sound which occurs at a specific engine rpm/speed, and it's a sound that gets really loud, but then dies off if the rpms increase/decrease, it's probably cureable.
The rear hatch of the C6 coupe can act like a really good bass horn. Combine that with rear panels that resonate at a specific frequency, and then add an exhaust that puts out sound at that specific frequency, and you have major drone.
So you can change the exhaust (some exhausts are higher pitched, getting the sound out of the trouble spot), drive at a different rpm (also changing the output frequency), or you can address the real "problem" which is the vibration of the rear hatch area, which magnifies the exhaust output.
Dynamat Xtreme or RaamMat BXT applied to the plastic tub in the rear hatch will deaden the panels, preventing the amplification of the exhausts output in that specific freqency range. Then you'll hear just the exhaust output without any drone.
With my PowerFlo exhaust installed, at 70 mph in 6th, with a light load on the engine, you couldn't hear the passenger unless they were practically shouting. The exhaust wasn't that loud from the outside of the car, and if the windows were rolled down, the drone wasn't as bad either - which pointed to the fact that it wasn't the exhaust.
It was the inside of the car reacting to the exhaust output. So instead of changing the exhaust (which I liked), I changed the portion of the car that was reacting to the exhaust, creating the drone.
Now I can still hear the exhaust, but there's no drone!
Before:
Overkill with deadening material (you really only need 30%-40% coverage, but I wanted to be thorough...
):
If you're defining drone as just a loud constant sound from the exhaust, then it may be just the exhaust, and yeah, you've got to get rid of the exhaust.
But if the drone is a sound which occurs at a specific engine rpm/speed, and it's a sound that gets really loud, but then dies off if the rpms increase/decrease, it's probably cureable.
The rear hatch of the C6 coupe can act like a really good bass horn. Combine that with rear panels that resonate at a specific frequency, and then add an exhaust that puts out sound at that specific frequency, and you have major drone.
So you can change the exhaust (some exhausts are higher pitched, getting the sound out of the trouble spot), drive at a different rpm (also changing the output frequency), or you can address the real "problem" which is the vibration of the rear hatch area, which magnifies the exhaust output.
Dynamat Xtreme or RaamMat BXT applied to the plastic tub in the rear hatch will deaden the panels, preventing the amplification of the exhausts output in that specific freqency range. Then you'll hear just the exhaust output without any drone.
With my PowerFlo exhaust installed, at 70 mph in 6th, with a light load on the engine, you couldn't hear the passenger unless they were practically shouting. The exhaust wasn't that loud from the outside of the car, and if the windows were rolled down, the drone wasn't as bad either - which pointed to the fact that it wasn't the exhaust.
It was the inside of the car reacting to the exhaust output. So instead of changing the exhaust (which I liked), I changed the portion of the car that was reacting to the exhaust, creating the drone.
Now I can still hear the exhaust, but there's no drone!
Before:
Overkill with deadening material (you really only need 30%-40% coverage, but I wanted to be thorough...
):
08-10-2010, 09:10 AM
#30
Safety Car
I installed them on my 07. I seriously looked at the BB Fusion as well but decided against it after the factory stated that for an A6, there would be some drone even with the valves shut.
Last edited by j_digi454; 08-10-2010 at 10:58 AM.
08-10-2010, 10:39 AM
#31
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Im also looking for an exhaust for my 07 c6, I want something louder that a BB route 66. Everybody seem to hate the BB bullet because of the drone. Stupid question what is npp ? Will a zo6 exhaust fit a regular a c6 ? I want to ask the experts .
08-10-2010, 11:05 AM
#32
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The system is good for an extra 6 HP when its open according to GM. My dyno tuner verified that he sees the HP increase when they open up.
The basic difference between the Zo6 and c6 NPP is 3" zo6 vs 2.5" c6 exhast pipes. I'm not sure but I think the zo6 npp can be installed on a c6. There will be a mismatch in pipe size (until you put headers and 3" x pipe on
08-10-2010, 02:11 PM
#33
Race Director
For the OP, do yourself a favor and learn from the rest of us. Try and find a local vette club or show near you and take a listen in person to some after market exauhst. Everyone's ears are different.
The SLP Loudmouth is awesome sounding exhaust..I had it on my C5 for a long time, and have heard it on the C6 too. It is very loud and not for everyone.
Everybody here is naturally going to tell you to get what they got
but you have to get what YOU like since you have to live with it in the car.
Good luck and welcome to the forum
The SLP Loudmouth is awesome sounding exhaust..I had it on my C5 for a long time, and have heard it on the C6 too. It is very loud and not for everyone.
Everybody here is naturally going to tell you to get what they got
but you have to get what YOU like since you have to live with it in the car.Good luck and welcome to the forum
08-10-2010, 06:26 PM
#36
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Thank You all for the great advice and tips, I've been doing a lot of research the past few days and have found some things I like. If I did go with the billy boats with the npp would I need to take them to a specialty corvette shop for the best job? For the guys that have the billy boats will a corvette plate fit inbetween those 4in pipes?
- Mike
- Mike
08-10-2010, 07:12 PM
#37
Race Director
08-11-2010, 12:37 AM
#39
Instructor
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St. Jude Donor '10
Thank You all for the great advice and tips, I've been doing a lot of research the past few days and have found some things I like. If I did go with the billy boats with the npp would I need to take them to a specialty corvette shop for the best job? For the guys that have the billy boats will a corvette plate fit inbetween those 4in pipes?
- Mike
- Mike
Best of luck!
-Steve
08-12-2010, 12:00 AM
#40
Burning Brakes
Depends how loud you want it and what your willing to spend. All these systems are a fortune. I think the loudmouth II has a glasspack type muffler on it, although it is straight through. I Have NPP's on my 05, which sound good, though I wish they were louder sometimes. Not sure if they are louder then the SLP, I know they are not louder then bullets. hopefully someone else can chime in here. Good luck finding a set used though.