The CP Pistons Bullet Race piston set for Chevy LS7 applications specifies a 4.135" bore, 4.125" stroke and 6.125" rod with a 1.055" dimension listed; it ships as a matched set of eight. As part of the Bullet Race family, this set delivers the precise sizing LS7 builders require and is made-to-order (MTO non-cancelable) per the listing.
CP Piston BRS Chevy LS7 4.135 Bore 4.125 Stroke 6.125 Rod 1.055 Set Of 8 (MTO Non-Cancel)