The CP Pistons Bullet Race piston set for Chevy LS7 applications lists a 4.130" bore, 4.125" stroke and 6.125" rod with 1.055" (compression?) detail and is sold as a set of eight. Provided as a made-to-order (MTO non-cancelable) entry, this Bullet Race set supplies the exact bore, stroke and rod combination specified for LS7-based engine builds.
CP Piston BRS Chevy LS7 4.130 Bore 4.125 Stroke 6.125 Rod 1.055 Set Of 8 (MTO Non-Cancel)