Mack Replacement Fuel Tank Step 20816521 85QM4192M4 *Please Verify OEM Number Before Purchase Fuel Tank Step Fits Mack Granite Pinnacle Terrapro Titan And Vision Models Direct Aftermarket Replacement For OEM #s: 20816521 85QM4192M4 Designed With Non-Slip Thread Patterns Reduces Slips & Increases... See More