[Vehicle Fitment-1]: Compatible with Buick Allure 2005-2007, Allure 2008 V6 3.6L, Allure 2008-2009 V6 3.8L, Century 2000-2005, LaCrosse 2005-2007, LaCrosse 2008 V6 3.6L, LaCrosse 2008-2009 V6 3.8L, Regal 2000-2004; Compatible with Chevrolet Impala 2006-2008 V6 3.5L, Impala 2006 V6 3.9L, Monte Carlo 2006-2007 V6 3.5L, Monte Carlo 2006 V6 3.9L [Vehicle Fitment-2]: Compatible with Pontiac Grand Prix 2005-2008 (Base), Grand Prix 2005-2007 (GT), Grand Prix 2005 (GTP), Grand Prix 2001-2004; Compatible with Oldsmobile Intrigue 2000-2002 [Reference Number]: The A-Premium Vacuum Brake Booster's reference number: 54-74823, 18042269, 88967238, 18048230, 5474823 [Specification]: ①Without Master Cylinder; ②Brake Booster Diaphragm Style: Dual; ③Diaphragm Diameter: 10.915(IN)/277.241(MM); ④Master Cylinder Stud Thread Size: M10x1.5; ⑤Material: Steel; Compatible with A-Premium Chevrolet Brake Booster [Superior Quality]: A-Premium Brake Booster are coated with anti-rust coating, which can effectively prolong the Lifespan. Premium craftsmanship and materials ensure superior quality and durability, and excellent performance enhances the whole braking system A-premium Vacuum Power Brake Boosters are an ideal choice to replace your broken Vacuum Power Brake Boosters. All Vacuum Power Brake Boosters meet or exceed OEM specifications. Due to high manufacturing standard, it will come with one year quality guarantee.

Compatible with Buick Models:
2005-2008 Allure V6 3.6L
2005-2009 Allure V6 3.8L
2000-2005 Century V6 3.1L
2005-2008 LaCrosse V6 3.6L
2005-2009 LaCrosse V6 3.8L
2000-2004 Regal V6 3.8L

Compatible with Chevrolet Models:
2006-2008 Impala V6 3.5L
2006-2006 Impala V6 3.9L
2006-2007 Monte Carlo V6 3.5L
2006-2006 Monte Carlo V6 3.9L

Compatible with Oldsmobile Models:
2000-2002 Intrigue V6 3.5L

Compatible with Pontiac Models:
2001-2003 Grand Prix V6 3.1L
2001-2008 Grand Prix V6 3.8L

Specifications:
Brake Booster Diaphragm Style: Dual
Color: Gray
Diaphragm Diameter (IN): 10.915
Diaphragm Diameter (MM): 277.241
Master Cylinder Included: No
Master Cylinder Stud Thread Size: M10x1.5
Material: Steel

OEM Number: 54-74823, 18042269, 88967238, 18048230
Quantity Sold: One Piece
Note: It comes without Master Cylinder