nmarple254

Looking at some ZO6 mufflers. How can you tell the difference between Bi-mode and NPP from looking at them? Thanks.

RicK T

Well, the quick way is to look in the tips. If they have perforations in them, they are NPP. Z06 muffler tips don't have the perforations. Here's a pic of NPP for example:

http://forums.corvetteforum.com/1576985331-post7.html

nmarple254

Ok thanks. What is the big difference between the two? I am trying to decide if I can buy a full zo6 exhaust and sell the mufflers for a decent amount after replacing them with some LGs.

RicK T

Stock Z06 mufflers are much quieter, more mellow, than the NPP's. So, as a result, used Z06 mufflers generally are in less demand and sell for about half, or less, what NPP's sell for. The Z06 mufflers can be modded inside to be about as loud as NPP's but that's extra work that many don't care to get involved in.

nmarple254

Thanks for the info.