True Dual Exhaust

[Tom73]

Cat Converters were first used on Vettes starting with the '75 model year. So '74 and earlier Vettes do not have to deal with the cat issue.

tom...

 

[JohnZ]

'92-'95 Vipers had factory sidepipes with cats, and the new '03 has gone back to real sidepipes too; the Viper cats have always been smaller/shorter than normal ones, and have about 3X the noble metal loading of normal cats ($$$). They have a cat and a round muffler inside each sill panel, and on the new '03, the pipes from each side cross over under the car right after the muffler, are joined with an "H"-pipe at the center crossover, and each pipe comes out on the opposite side from where it started; that way you get the sound of all ten cylinders on each side instead of just the sound of five on each side like the '92-'95's had. :cool

 

[Stallion]

So with Vettes from '74 and older, they don't have to pass any emission tests?

Thanks, everyone!

 

[Ganey]

Duals rec. for performance. Opt. all years, just not a factory option.

http://www.corvetteactioncenter.com/forums/showthread.php?s=&threadid=4373

Some might want to see what many refer to as my Exhaust topic.
http://www.corvettefaq.com/c3/ganeyexhaust.htm