exaust butterfly valves, where to get them?
 

im looking for a exaust butterfly valve, and home experience with them from anyone whose used them. for those that dont know...
http://i31.photobucket.com/albums/c3...9_68218322.jpg
it should help me with my noisy ass exaust, and give me some back pressure for low rpm torque.
any ideas guys? and has any one used one?

should get one that opens with throttle position so when your in low rpms it quite tell you step on it

thats neat, ive never seen anything like that before

wheres the throodle one? i really think this is the fix for na low end power

Only place I've seen it is from Apex'i. Just go to any dealer and they can order it for you. It'll run you about 140ish. Never heard of a throttle body one, the one your talking about should be the ATS silencer from Apex'i too. It has a valve inside the silencer that opens up as you give it more gas, crazy silencer. But that would run you about 130 (considering I'm running dual N1s, 260 is killer). But yeah hope that helps.

Summit Racing has Electric Exhaust Cut outs. Im going to be buying one my self for the exhaust system im building right now. I think the brand name is DMH?

You are intending to stick that thing in your exhaust and keep it semi-closed during low RPM driving? :) That's probably not the best idea. If it's close to the manifold then it will melt in short order. Putting a butt-plug in the exhaust will also make the car gutless down low (think of what it is like to drive on a clogged cat).

If you want to gain your low end torque back, fix those auxiliary ports. :) Removal really does seriously effect low end...