02-13 kawasaki klx110: fmf powercore 4 complete exhaust - 4-stroke race fmf when designing the powercore4, we looked at our top of the line products to deliver race-inspired performance at an economical price. the end result is a quality muffler with improved torque, increased horsepower and rugged durability all at a price that wont break the bank. overall increase in power and torque durable stainless steel and aluminum construction advanced packing material for maximum longevity champagne color anodized can removable spark arrestor included optional 96db quiet insert available