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I can see the need for aftermarket exhaust for appearance or sound. I've often seen people, including OP, refer to "performance" improvements too.
Can someone take a reply to explain what kind of performance improvements are to be expected?
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I experienced a stronger pull of power in the bikes low to mid-range. I never put the bike on the dyno before or after to confirm this, but after having ridden the bike for 3 years with stock pipes, my "seat of the pants" dyno tells me there is a little more on tap with the Staintunes.
I think there is some more power there even if it is only a little. I can feel it.
The stock pipes are heavy, the Staintunes are 13 pounds lighter (I weighed them).
The stock pipes run hot, they make the saddlebags hot and radiate heat for a long time after shutting down.
The Staintunes run a lot cooler, you can touch the cans 10 minutes after stopping, try that with stock pipes (actually don't you may need skin grafts
)
I went a step further and had my head pipes from the engine to the canisters ceramic coated. They claim coated pipes will run a cooler skin temp by up to 200 degrees.
I'm not sure on that but I am convinced the whole system runs cooler and I know for sure the smooth ceramic coating on the insides of the pipes make them flow better.
I have seen that proven on a flow measurement bench.
And they look pretty nice too.
I do know that my ST now runs considerably cooler in the lower legs and feet area than it did before.
I confirmed that on a trip to Nevada. My comparison was Texas in July