NPP Question
Safety Car
Joined: Sep 2006
Posts: 4,075
Likes: 6
From: Wilmington NC
The tips are 3 1/2 inches versus the stock tips which are 2 1/2 inches. veav626 is correct in that the pipes are 2 1/2 inches in both the stock and NPP systems. The larger tips are awesome looking and fill out the back valance nicely.
Melting Slicks
Joined: Nov 2008
Posts: 2,186
Likes: 10
From: Virginia Beach VA
St. Jude Donor '10-'11-'12-'13-'14-'15-'16-'17,’18,’19
NCM Sinkhole Donor
If you are thinking about having an NPP exhaust installed on your vette, I say go for it you will love it. You should also get the mild2wild controller.
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Safety Car
Joined: Sep 2006
Posts: 4,075
Likes: 6
From: Wilmington NC
Pro
Joined: Jul 2006
Posts: 552
Likes: 28
From: North Las Vegas Nevada
Npp
The exhaust inlets for the standard muffler and NPP are both 2.5 inches; however, the standard muffler has only one outlet which is split into 2 and the NPP muffler has 2 separate outlets. As a result it flows better. Also starting in 2009 the muffler pipe that goes up and over the axle is bent slightly different due to a differential cradle upgrade in the 2009 model and newer. As a result you would want the newer X pipe to with it.
Safety Car
Joined: Nov 2007
Posts: 4,446
Likes: 878
From: Bay Area CA
The exhaust inlets for the standard muffler and NPP are both 2.5 inches; however, the standard muffler has only one outlet which is split into 2 and the NPP muffler has 2 separate outlets. As a result it flows better. Also starting in 2009 the muffler pipe that goes up and over the axle is bent slightly different due to a differential cradle upgrade in the 2009 model and newer. As a result you would want the newer X pipe to with it.
Also, my 08 NPP exhaust tips measure 3.5 inches in diameter.
Race Director
Joined: Mar 2005
Posts: 10,399
Likes: 26
From: Austin Texas
The big difference between NPP and standard mufflers is the muffler oulet(s). The standard muffler has ONE less than 2.0" outlet that Y's into two tips, the NPP muffler has TWO outlets, the inside @ 2.4xx" and the outside @ 2.1xx". More than twice the flow available from the NPP.
Thread Starter
Racer
Joined: Jan 2008
Posts: 317
Likes: 0
From: Granbury TX
Thanks Guys. I did get some 08 takeoffs put on my 08. After I got home I thought they looked bigger and could not remember to size of my takeoffs. I love the sound and all my friends are jealous of my new toy.
Melting Slicks
Joined: Oct 2003
Posts: 2,655
Likes: 5
From: Brea CA
Ah...
The 4 Tips on NPP are 3.5 inches each... which is the same size as ZO6 Bi-Mode.
If by pipes you mean the 3" supply side on ZO6, that narrow down to 2.5" before the muffler , instead of the 2.5" on NPP... yes.
Also... the NPP, has a Solid pass through pipe INSIDE the muffler, instead of the Preferated pass through on the ZO6, so the sound does not get muffled.
Happy Holidays!
If by pipes you mean the 3" supply side on ZO6, that narrow down to 2.5" before the muffler , instead of the 2.5" on NPP... yes.
Also... the NPP, has a Solid pass through pipe INSIDE the muffler, instead of the Preferated pass through on the ZO6, so the sound does not get muffled.
Happy Holidays!
