Chevrolet Performance 23386145 Details Corvette Z06 Brake Upgrade Kit Features: 2-Piece Iron Slotted Rotors, 365mm x 26mm. Aluminum Mono-Block Four-Piston Fixed Calipers. High-Performance Brake Pads That Are 39% Larger Than Stock. Vented Pistons Improve Pad And Brake Fluid Cooling. Calipers Offer Differentiated Piston Diameters Of 30mm, 34mm, And 38mm To Ensure More Even Pad Pressure For Improved Pad Wear. Note: Brakes will not fit under stock base or Z51 wheels. Requires a minimum 4mm wheel clearance between the outboard face of the caliper and the inner wheel spoke. This application is for off-road use only because the stock Z51 wheels do not fit over the Z06 brakes. Any failures occurring as a result of the non-production wheels selected by the customer would not be covered.