Inspired by our total domination in American Flat Track exhaust, S&S Cycle has created a tunable two into two package for the HD® Fat Bob®. Taking performance exhaust to the next level by combining a two into two format with a hidden crossover, the new Grand National system is designed for pure, relentless performance. Clean bends, stainless header tubing and full shielding create an exhaust that makes real power without the punishment of melted boots and uneven torque delivery of most other short tract systems. S&S also includes wide band O2 sensor ports. Available in chrome or black ceramic, the Grand National 2:2 is a game changer in power, style and sound.