The Track Day Slip-On Line for the Yamaha YZF-R1 was specially developed for use on racetracks where lower noise levels are required. It is made from race-proven materials: titanium for the outer sleeve and carbon fibre for the end cap and the muffler bracket and clamp. The slip-on must be combined with either the L-Y10SO11T/TD link pipe for mounting on stock headers or the L-Y10E5/TD link pipe for mounting on the header set from the S-Y10E3-APT Evolution Line kit, Evolution Line S-Y10E6-APT or Racing Line S-Y10R15-APLT (the collector and headers with associated fitting material (flanges, springs, inner sleeves and lambda plugs - please refer to schematics of the mentioned systems). Information about noise levels are found under product description of mandatory link pipes.The mandatory P-MBY10E2 fitting kit, including the muffler bracket and clamp, must be ordered.THIS PRODUCT DOES NOT MEET EMISSION COMPLIANCE REQUIREMENTS FOR STREET OR HIGHWAY USE.