Hello Rocketstimpy,
I have the Vandemon e-valve exhaust, and love it, pricey but it is nice to be able to switch to stealth mode on long rides.
The headers, the titanium headers are 1/2 the weight of the stainless headers, the titanium model has springs, I don't care for the springs.
Both models flow about 19% more air at the exhaust port, and 9% more at the header outlet pipe.
Im going to order the stainless headers soon. This will complete my performance upgrades.
I have the Penner tune map installed, free flow air filter and love the way the Rocket runs now. It pulls a lot harder now than in stock configuration.
Also I get over 40.5MPG on the highway.