Yamaha Owners Manual - 2G 4G - LIT-18626-00-58 Mercury Mercruiser Exhaust System opening up when your RPMs

opening up when your RPMs climb and dialing things back at lower speeds

the engine control module can use the IAC valve to adjust idle airflow based on operating conditions

Maintains viscosity under heavy load and high heat

Power draw and performance are important

the 14" x 26" pitch is ideal

Yamaha Owners Manual - 2G 4G - LIT-18626-00-58 Mercury Mercruiser Exhaust System opening up when your RPMsYamaha Owners Manual 2G 4G LIT 18626 00 58 Models 2MSH, 2SG, M2SG 4LG, 4MLH, 4MSH, 4SG, M4LG, M4SG WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings. ca. gov.