Yoshimura Full System Racing Hepta Force (STB)

Fits: 2024-2026 Kawasaki ZX-4RR

The HEPTA FORCE TSS Racing Cyclone for the Ninja ZX-4R/ZX-25R is a full exhaust System developed for high performance on the circuit. Its 4-2-1 layout keeps mid-range tractability while delivering sharp revving at high rpm.

The HEPTA FORCE TSS silencer combines a heptagonal-section body with a carbon end in a tapered shape for a stylish, compact design. The included sound diffuser can be fitted or removed to choose the volume for the riding situation. Built as a cost-effective stainless steel full System, it is approximately 40% lighter than the standard muffler.

• Main material: stainless steel
• 4-2-1 layout
• Removable sound diffuser included
• CloSErange exhaust noise, without / with sound diffuser: ZX-4R (23) 112 / 104 dB at 8,000 rpm; ZX-25R (23-24) 111 / 104 dB at 8,000 rpm; ZX-25R (21-22) 109 / 104 dB at 7,750 rpm (reference values on a standard bike)
• Weight (STD / SSF / STB): ZX-4R (23) 10.1 / 5.3 / 5.1 kg; ZX-25R (23-24) 9.1 / 5.3 / 5.1 kg; ZX-25R (21-22) 8.6 / 5.3 / 5.1 kg
• Silencer Cover, glass wool and carbon end can be remade through Yoshimura's after-sales service
• Use genuine OEM gaskets
• Racing muffler for closed circuits only; never ride on public roads
• Requires regular inspection and maintenance, especially before the race season or major events
• No warranty, claims or returns, and no liability for related accidents

• Finish: STB (Titanium Blue Cover)