Item Description Wilwood 260-8555-BK  Aluminum Tandem Master Cylinder 1" Bore  The 1” bore can be used in manual and power assisted applications and does not come with a pushrod. The 1-1/8” bore is designed for use primarily with power brake applications, either from vacuum assist or hydraulic assist systems. They’re designed for mount flanges from 3.22” to 3.40”, common measurements for most domestic cars and trucks from the mid 1960s to present, and offer fluid outlet ports on both sides of the bore.   About Us Our Store We deal in store close outs, lost freight and over runs. 99% of our inventory is new and unused. Some things may have cosmetic damage or the packaging may be damaged. We try our best to be upfront with everything because the best customer service is our #1 goal! Be sure and look through our store and come back often because inventory is always changing! Shipping Returns We have 1-2 day handling on all items purchased before 11 am EST. We use FedEx and USPS for shipping. If a tracking number is available, it will be sent to you. Freight shipments take longer to process due to having to palatalize the item for safe shipment and setting up a pickup. Freight will have between a 1-4 day handling time before shipment. Returns are excepted on any item that is defective. Please email us through eBay to correct any problem. If you ordered something by mistake and want to return it, you will be responsible for shipping costs, 15% restocking fee and the item must be in unused condition. KJ