Not only does the Yosh pipe surpass the strictest emissions standards in the country, it also meets Motorcyclist's criteria for a kickass exhaust: good looks, reduced weight, exhilarating sound _and _increased power. The R-77 is based on the system used on the Yoshimura Suzuki Superbikes, and that polished stainless canister looks damn fine on the Honda's right flank. Weighing in at 10.2 pounds, the slip-on is fully 3 lbs. lighter than the stock muffler. A larger-diameter bore lets out a little more of the CBR's roar, with a sweet, smooth note that's just loud enough to let you know it means business. Yoshimura wouldn't build it if it didn't make power, and back-to-back dyno runs showed a healthy improvement in midrange power, right where the street rider needs it. Horsepower was up about 5 bhp between 5000 and 6500 rpm and torque jumped 10 lb.-ft. within the same range.