The CP Pistons Bullet Race piston set for Ford 408ci applications lists a 4.030" bore, 1.280" chamber figure and a flat-top profile, offered as a set of eight. These pistons are sized to the documented bore and crown dimensions for the 408ci configuration and provide compatibility with the head and crank geometry specified for that small-block variant.
CP Piston Bullet Race Series Ford 408Ci Std/Twisted 4.030 Bore 1.280 Ch -8.7CC Flat Top Set Of 8