Tail pipe halfsies?

[mike100]

Don't buy mufflers with dual outlets unless you want to limit your trips to 25 minutes or less. I had made up some c6 NPP vacuum actuated valves for my stainless works mufflers.

You can hear the drone in this video- it is worse in the car.
http://s29.photobucket.com/user/msch...f3c58.mp4.html

[XfireZ51]

So Mike, u pass Cali emissions w the headers and cats?
Are u saying u get drone w the Z06 NPP?

[mike100]

Originally Posted by XfireZ51

So Mike, u pass Cali emissions w the headers and cats?
Are u saying u get drone w the Z06 NPP?

No, sadly, the long tubes and LS7 cats had to come off to pass the visual part of the inspection. Depending on if I still have the car in 2017, I wanted to do aftermarket mufflers on my stock exhaust set with bmw vacuum actuators I have.

The big 3" SW catback with their fairly loud mufflers still droned lugging in 6th gear, but generally speaking, it didn't drone with the flaps closed.

[Bob Eyres]

Bob, those cutouts ahead of the mufflers look slick.
My car has headers, no cats, no resonator, and a 3" X pipe and 3" B&B system all the way back. It produces the dreaded drone, but I'm a masochist and love it. The loudest version is to drop the mufflers at the track. A 50lb. weight saving, and the nastiest shriek a stock Corvette can make. (and a 2mph. increase in trap speed.)
Your conversation makes me wonder if 3" mufflers with Helmholtz tuning are available?

[WARP TEN]

Originally Posted by Bob Eyres

Bob, those cutouts ahead of the mufflers look slick.
My car has headers, no cats, no resonator, and a 3" X pipe and 3" B&B system all the way back. It produces the dreaded drone, but I'm a masochist and love it. The loudest version is to drop the mufflers at the track. A 50lb. weight saving, and the nastiest shriek a stock Corvette can make. (and a 2mph. increase in trap speed.)
Your conversation makes me wonder if 3" mufflers with Helmholtz tuning are available?

Actually, Bob, that is exactly what Marc Haibeck has done since he bought his car in 1993. He welded three bolt flanges just ahead of the mufflers and always removes them for a drag race. Gets a weight saving but also says it is a bit of a pain in the butt to remove them each time. Said once that if he had to do it all over again he would probably do what I did. I really don't know what aftermarket mufflers are out there with Helmholtz resonators today, other than Corsas.--Bob