The Torque Control Valve (T.C.V.) by SARD...

[crozzover69]

I don't know if this is a pretty new device, however i would like to know if any one has it and if it helps with noise reduction on a full catback and as it suggests controls/regulates/enhances lower to upper RPM? Its on more-japan.com and any input would help Mkay!

[FaLKoN240]

My friend had one on Trust DDs, (one of the loudest resonated exhausts ever) on his NA KA, his car was very tolerable during freeway conversation.

Then he got turbo, and it got even more quiet. It works.

[crozzover69]

what about at idle did it do anything special for this. like did it make it super stable, cause my bro has an sr egine and it does this thumpy/burply mess of a noise and i've seen some n/a cars do this as well. I was also wonderin if maybe it could also help with this.

[articdragon192]

FRSports is selling one also in case you were looking for one. Seems like thgis mated with an Apexi ECV would be the winning ticket to quieting down the exhuast.
http://www.frsport.com/sard-exhaust-torque-converter-control-valve-p-687.html