This is a set of 4 heat shields that bolt to the top of the 4 mufflers to shield the exhaust heat from the floor. These are a very good fitting part that looks 100% correct. They need to have the holes drilled for your mounting bolts. These will fit all 330 GTC, 330 GT, 275 GTS, 365 and possibly others. 395.00 a car set of 4.