Hey Rob, hope all is well. The JS .23 using the 0801 runs hotter in the exhaust, and will tend to get soft on the bottom-end after everything is fully heat saturated. On the .21 it's dialed, I've been using it personally to test my 8 port, and I believe Joe is running it on his RP .21's in California at Revelations Raceway. A short header on the 0801 will help by advancing the savaging pulse, but the runtime will decrease.

The Dynamite 086 is the best average all around pipe, power, runtime, etc.. it's not the best pipe for peak power numbers, but a very good starting point.