This is a 54500 1NA1A. The Febest Number is NAB-S51B. This fits the following cars: NISSAN FUGA Y50 2004-2009, NISSAN SKYLINE V36 2006-, NISSAN G35/37/25 SEDAN V36 2006-, INFINITI M35/45 (Y50) 2004-, INFINITI FX35/50 (S51) 2008-, INFINITI FX35/FX37/FX50 (S51) 2008-. The compatible part numbers for this part are: 54500-1NA1A, 0, 545001BA3A, , , 545001NA1A 1 YEAR WARRANTY: All Febest Parts come with a 1 Year Warranty backed by great customer service. ONLY THE BEST STEEL: Febest only uses the best high-carbon steel. All Febest parts that contain metal use an expensive heat treatment process that improves metal strength and performance, also our parts use a higher level of polish to allow the bearing to roll smoother and last longer. ONLY THE BEST RUBBER: Each Individual component of this part is made with high quality materials. Unlike our competitors Febest uses only high quality Natural Rubber (75%) and (25%) synthetic Rubber. This means that it is more durable, will last longer, and can handle temperatures from -40 to +140 degrees. The Rubber wont rub off on your hand like the cheap replacement parts offered by competitors QUALITY IS EVERYTHING: The synthetic lubricant Febest uses is 10x as expensive as our competitors, and lasts 3x as long. GERMAN QUALITY CONTROL: Febests German quality control experts ensure that all parts are of the utmost quality. We have specially developed metals and rubbers that create a super durable, and long lasting end product. Brand FEBEST Model NAB-S51B Position Inner Item Weight 2.25 pounds Manufacturer Febest OEM Part Number 545001BA3A, 545001NA1A, NAB-S51B Product Dimensions 3.46 x 2.64 x 3.46 inches Manufacturer Part Number B-NAB-S51B-AMZ-54500-1NA1A