Yamaha Exhaust Muffler (1979-1985) G1 2-Cycle Golf Cart Allows proper air flow from your engines exhaust. Our parts meet or exceed OEM quality standards. Make sure your key switch is in the off position before performing any maintenance. Fits the Following Cart(s): Yamaha (1979-1985) G1 2-cycle gas models. WILL NOT FIT 1982 model.