Dynatech Vortex Exhaust Cones??

[kARLUG]

I have headers, high flow cats & Borla mufflers with side exhaust. Noise is excessive, setting off car alarms in neighborhood idling down the street. Sum mit sells the exhaust cones and Dynatech claims it reduces noise with little or no h.p. loss. Has anyone tried these? Comments?
Thanks

 

[zen garage]

The cones do help. I recently installed b&b headers, roe high flow cats and borlas on my GTS with side exhaust. Not only was it loud, but the resonance and drone actually hurt my ears.
I spoke with a few guys at Roe and they recommended the cones. I pulled off the turndowns, welded the cones all the way in the borlas and the sound is amazing. No more bleeding ears, just a constant grin on my face ear to ear.
As well I noticed no hp loss whatsoever.

 

[kARLUG]

Thanks Zen for your input. I'm ordering a set today.

 

[Shelby3]

They advertise (on the box they came in) 2 to 3db of noise reduction. That ain't much on a loud car. I put them on another car and could not hear any difference.