I liked the change a LOT at first. It was great! Power delivery consistent, no lean spots in the RPM curve. Did well on a wet run up Mount Baker.
Then it went all out of whack, idling at 800rpms, and running rich at high RPMs. Back to the shop. They really worked on it, and it's mostly better...but has this metallic switch "pop" rolling off at slower speeds, with a drop in power. It sounds almost like the solenoid clicking, but it's coming from the motor. Still smells like fuel, too, although less. I'd really like to know what caused it; and am concerned that I'll be in this perpetual tuning department, with the DP needing tuning every time the temperatures drops ten degrees.
The pipes are great, and I'm not a fan of carbon. Smaller than stock, tucked out of the way.