I changed my exhaust again. This is version 5, with the Dynomax Super Turbo muffler. I know, I've lost my mind.

I installed a Jegs electric cutout before the muffler. The details on the exhaust are in this thread. Last night I got some 1/4 mile runs with the cutout closed and open for comparison. The attached file shows all the details.

In a nutshell: My best time with the cutout closed was a 12.830. My best time with it open was 12.744. The cutout was 0.086 faster open than the Dynomax Super turbo. That's just a little under a tenth. I did not expect a big difference. I think it speaks well of the Dynomax muffler. I thought a turbo style muffler might hurt performance a little more than that.

"But wait" you say, "I thought your were faster than that Matt?" I am normally. I removed the stacked pulleys while diagnosing a problem. Nothing for you to worry about, I should have it back to normal soon.