Yoshimura RS-4 Slip-On Exhaust System – Stainless Steel with Carbon Fiber
The Yoshimura RS-4 Slip-On Exhaust System delivers superior performance and signature Yoshimura sound. Developed in collaboration with factory race teams, this slip-on features the iconic pentagonal muffler design that optimizes airflow for increased power and improved throttle response. Easy bolt-on installation makes this the perfect upgrade for riders seeking performance gains without a full system replacement.
Key Features:
- Pentagonal Muffler Design: Signature RS-4 shape enhances aesthetics and airflow
- Maximized Internal Volume: Optimized for improved exhaust efficiency and power
- Polyresonant Duplex Chamber: Boosts performance while refining exhaust tone
- Two-Stage Core Baffle: Stepped design balances sound and performance
- Spark Arrestor Compatible: Versatile for street, track, and off-road use
- Sound Insert Ready: Adjustable sound output options
Construction & Materials:
- Stainless steel muffler body
- Carbon fiber end cap
- Factory-developed design
- Corrosion-resistant finish
- Lightweight construction (12.8 lbs)
Performance Benefits:
- Increased Horsepower: Improved exhaust flow unlocks hidden power
- Enhanced Throttle Response: Reduced backpressure for quicker acceleration
- Weight Savings: Lighter than stock exhaust
- Aggressive Sound: Deep, race-inspired exhaust note
- Easy Installation: Bolt-on slip-on design, no cutting required
Sound Customization:
The RS-4’s stepped, two-stage core baffle effectively manages sound levels while maintaining an aggressive exhaust tone. Compatible with optional sound inserts for quieter operation when needed, making it suitable for both street riding and track days.
Specifications:
- Brand: Yoshimura
- Series: RS-4
- Part Number: 123402D520
- Configuration: Slip-On
- Material: Stainless Steel / Carbon Fiber
- Muffler Shape: Pentagonal
- Weight: 12.8 lbs
- Country of Origin: USA
What’s Included:
- RS-4 slip-on muffler
- Mounting hardware
- Installation instructions
- Yoshimura quality guarantee
Installation:
Simple bolt-on installation. Replaces stock muffler only – retains stock header and mid-pipe. Professional installation recommended for optimal fitment. All necessary mounting hardware included.
Perfect for: Riders seeking an easy performance upgrade with signature Yoshimura styling and sound. Ideal for street riders, weekend warriors, and track enthusiasts who want bolt-on power gains.
