bi mode Muffler question
Race Director
Joined: Mar 2005
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From: Austin Texas
Team Owner
Joined: Aug 2002
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St. Jude Donor '05-'06-'07-'10
As noted the Z06 mufflers (from any year) will not be a bolt on. The plumbing on your car is 2.5" diameter pipe. The Z06 is 3". The only way to put Z06 mufflers on your car is at some point in the system you will need to have an adapter pipe fabricated to go from 2.5" to 3".
Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 26
From: Austin Texas
The Z06 mufflers have the same inlet size as the NPP (2.5") but the pipe to the muffler is larger (3.0").
The Z06 mid-pipe ends with 3.0" diameter, the Z06 pipe to the muffler from the mid-pipe is 3.0".
The NPP mid-pipe ends with 2.5" diameter, the NPP pipe to the muffler is 2.5".
The Z06 mid-pipe ends with 3.0" diameter, the Z06 pipe to the muffler from the mid-pipe is 3.0".
The NPP mid-pipe ends with 2.5" diameter, the NPP pipe to the muffler is 2.5".
Drifting
Joined: Aug 2006
Posts: 1,523
Likes: 34
From: King George Virginia
They way to do this is to buy a full Z06 exhaust from manifolds to mufflers if you have a manual transmission. If you have an automatic your only choice is to cut the 3.0 inch pipes off the Z06 cans about 3/4 of an inch from where they go into the can. Since the Z06 mufflers neck down to 2.5 anyway you are not loosing anything. Take your stock mufflers and cut the 2.5 inch pipe off these as close as possible to the can and have them welded on the Z06 cans. Then get a NPP in a box system so you will have bi mode muffler control. Since you have a convertible you will have to use the 2.5 inch pipe off your old mufflers. If you choose to use the 3.0 inch pipe it will hit the frame and make a lot of noise while driving on anything but smooth roads. I did this mod on Tuesday this week on my 07 A6 convertible. The sound is great at speed quite with no drone, even with the valves open. Good Luck with this mod, its a good one.
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Advanced
Joined: Feb 2011
Posts: 53
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From: Covington TN
They way to do this is to buy a full Z06 exhaust from manifolds to mufflers if you have a manual transmission. If you have an automatic your only choice is to cut the 3.0 inch pipes off the Z06 cans about 3/4 of an inch from where they go into the can. Since the Z06 mufflers neck down to 2.5 anyway you are not loosing anything. Take your stock mufflers and cut the 2.5 inch pipe off these as close as possible to the can and have them welded on the Z06 cans. Then get a NPP in a box system so you will have bi mode muffler control. Since you have a convertible you will have to use the 2.5 inch pipe off your old mufflers. If you choose to use the 3.0 inch pipe it will hit the frame and make a lot of noise while driving on anything but smooth roads. I did this mod on Tuesday this week on my 07 A6 convertible. The sound is great at speed quite with no drone, even with the valves open. Good Luck with this mod, its a good one.
Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 26
From: Austin Texas
NO year Z06 is a bolt in, only an '08 NPP will bolt in without cutting or welding.
With no controller the valves stay open.