Remus Sport Flow Slip-On Exhaust Kawasaki Ninja 400 The Remus Sport Flow Slip-On Exhaust brings together Remus's years of experience, a lightweight design and high end materials to create a true work of art. The Sport Flow features a high-quality carbon fiber sleeve with a flow optimized interior that not only boosts power and torque across the rev range, but also yields the sonorous sound Remus is known for. Features: High-grade carbon fiber construction Performance and torque increase Sporty, sonorous sound Weight-optimized Sound insert not included