The CP Pistons Bullet Race Series set for Chevy 428ci (head: LT1 14-18) specifies a 4.125" bore and is supplied as a set of eight pistons. This listing provides the piston dimensions aligned to the 428ci configuration noted, supplying engine builders with the Bullet Race Series pistons sized for that displacement and head pairing to support correct assembly where those specifications apply.
CP Piston Bullet Race Series Chevy 428Ci Head: Lt1 14-18 Bore :4.125 Set Of 8