3148826|Rebuild Re-Ring Kit for 1991 Ford Explorer 4.0L - RRK422XP6. Replace your original Rebuild Re-Ring Kit with this direct-fit unit for the 1991 Ford Explorer 4.0L. Trusted by mechanics and DIYers alike, it helps maintain optimal engine operation and performance.. 1991 Ford Explorer 4.0L Engine Rebuild Re-Ring Kit - RRK422XP6 Also fits the following vehicles: 1990 Ford Aerostar 4.0L Engine Rebuild Re-Ring Kit, 1991 Ford Aerostar 4.0L Engine Rebuild Re-Ring Kit, 1992 Ford Aerostar 4.0L Engine Rebuild Re-Ring Kit, 1993 Ford Aerostar 4.0L Engine Rebuild Re-Ring Kit, 1994 Ford Aerostar 4.0L Engine Rebuild Re-Ring Kit, 1991 Ford Explorer 4.0L Engine Rebuild Re-Ring Kit, 1992 Ford Explorer 4.0L Engine Rebuild Re-Ring Kit, 1993 Ford Explorer 4.0L Engine Rebuild Re-Ring Kit, 1994 Ford Explorer 4.0L Engine Rebuild Re-Ring Kit, 1990 Ford Ranger 4.0L Engine Rebuild Re-Ring Kit, 1991 Ford Ranger 4.0L Engine Rebuild Re-Ring Kit, 1992 Ford Ranger 4.0L Engine Rebuild Re-Ring Kit, 1993 Ford Ranger 4.0L Engine Rebuild Re-Ring Kit, 1994 Ford Ranger 4.0L Engine Rebuild Re-Ring Kit, 1994 Mazda B4000 4.0L Engine Rebuild Re-Ring Kit