http://www.exhaustcutouts.com/

If you want your max to sound like a race car, put one of these in. You probably won't pass smog, but your car will be hella fast.

 

or just get a stright pipe and bolt ur cat back on when it is time for admissions like i am doing!

 

That would be GREAT for the track! Then I might be able to hear my cars' engine over the friggen Honda boy with open headers.

 

The only way that you can damage your engine with an exhaust cut-out is if you open the cut-out when in idle. We suggest that you do not open the cut-out below 1500 rpms for extended periods of time. For performance increase, wait until you have hit the WOT (wide open throttle) range of 3500 rpms, you need backpressure to create torque. Once you've passed the 3500 rpm mark in 1st gear, you can leave the cut-out open until the end of the race.

Is there a switch to open it. All I see is a handle. Does someone need to ride underneath the car until 3500rpm to move the switch?

 

The night I went to the track with MrBurner and 2000MaximaSE, Adam unbolted the exhaust from the y-pipe back and it did nothing to his time or mph (and he has an automatic which is consitant). It did make it very loud.

 

There is a way to mount the switch inside your car, they say that it looks like a trunk release type thing. It's in their faq I think.