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The CP Pistons Bullet Race Series piston set for Ford Big Block 521 applications is a matched set of eight pistons specified to the Kaase SCJ M6049 head dimensions. The listing gives a 4.390 in bore to match that head profile and supplies the core sizing builders need for correct cylinder fit and chamber volume; this item is made-to-order (MTO non-cancel).
CP Piston BRS Ford Big Block 521 Head: Kaase Scj M6049 Bore : 4.390 Set Of 8 (MTO Non-Cancel)
