This Remaster master cylinder features a small, compact, 1-piece body machined out of 6061 T6 billet aluminum with a 1-1/8" bore, left side ports and a 2-bolt mounting flange designed specifically for the 1999-04 SN95 Mustang hydroboost. The billet top is attached with 6 allen screws and has two large billet aluminum, knurled screw-on caps making for easy filling without spillage. The unique outlet port design allows for either inverted flare (w/included removable seats) or banjo style, straight fittings.