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ALUMINIUM TUNE PIPE RETAINER WITH O RING

HOLDS AND LOCK YOUR TUNE PIPE AND HEADER POSITION AFTER TO YOU FOUND THE SWEET SPOT FOR YOUR ENGINE ( ABOUT 12.5" AIRFLOW DISTANCE FROM EDGE OF PISTON TO THE END OF THE BAND )

FOR HEADER - 7/8" 22mm DIAMETER

FOR 23/26CC GAS BOAT ENGINE