Same thing as the SB-19. The pipe of choice for all 3D pilots for the YS91 SR (3C, 3D, whatever) engine.

This Tuned Pipe has been designed and produced for exsclusively for 3D.

For 12,000-15,000rpm Maximum Power is available.

When set for 15,000-16,000rpm and in event RPM decreased due to excess steering load, the system keep the intended RPM.