1977-1983 BMW 320i -Position: Front. Feature and Benefit 8 PROTECT YOUR NEW STRUTS FROM DIRT, DEBRIS AND SALT WITH A KYB STRUT BOOT, PART NUMBER: SB112. Feature and Benefit 3 THE KYB EXCEL-G USES A TRIPLE LIP FLUID SEAL TO REDUCE THE CHANCE OF OIL AND GAS LEAKING OUT.