[BOSCH EXPERTISE] - Bosch has produced over 1 billion fuel injectors and is the number one name in original equipment (OE) injectors, with more than 45 years of gasoline system experience [OPTIMAL PERFORMANCE] - All applications provide precision flow rates and original spray patterns for optimal performance in all driving conditions [HIGH EFFICIENCY] - Engineered for low fuel consumption and emissions - particularly in the starting and warm-up phase - and outstanding warm-start performance [PREMIUM QUALITY] - Manufactured with premium quality high-alloy steels and plastic coverings for optimum corrosion resistance and longevity [READY TO INSTALL] - Bosch injectors feature guaranteed OE fit, form, and function, and include seals and/or o-rings necessary for installation, so they're ready to install right out of the box Replaces OE numbers: 12577869, 12597871 Compatible with select vehicles (Note: engine affects fitment - verify specific vehicle fitment details with fit checker above): BUICK: 2006-11 Lucerne; CADILLAC: 2006-11 DTS, 2007-09 SRX, 2007-10 STS, 2007-09 XLR