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