Brand new in box hydroboost brake booster. Fits 99 and up chevy silverado/tahoe. All lines and fittings. Still in orig. box with instructions and everything to bolt it in. 100% bolt in kit. You can check them out at hydroboost.com. These are expensive units but are very nice and work so well most times you don't even need to upgrade rotor size. Asking $600 o.b.o. Lmk. Please pm me for details or info. Thanks!