CREATE TABLE table_name_88 (year VARCHAR, entrant VARCHAR)
SELECT year FROM table_name_88 WHERE entrant = "belond equa-flow / calif. muffler"
ปีไหนที่มีผู้เข้าประกวด belond equa-flow/calif. ท่อไอเสีย?
Which year is that has a Entrant of belond equa-flow / calif. muffler?