KB Performance, zestaw kutych tłoków o dużym otworze 3-5/8. +.040″

Forged 3-5/8 big bore piston set. Used with 3-5/8″ big bore cylinders with 5.330″ (stock) to 5.530″ (+.200″) length. Must use 4-1/4″ (stock) (88″); 4-1/2″ (93””); 4-5/8″ (96″) to 4-3/4″ (98″) stroker flywheels. 8.50:1 CR with 117cc head; 4.250″ stroke & Std. cyl. length. 9.38:1 CR with 117cc head & 4.750″ stroke & Std. cyl. length. Piston weight 440gr. Piston pin weight 97gr. Piston pin dia. .791″ / offset. Head type: Dome with -42.3cc. Compression height 1.285″. Bore 3.625″. Stroke 1.250″ to 4.750″. Rod length 7.440″. Cyl. length 5.530″ Std to +.200″ higher. All KB forged pistons are made from 4032 alloy; a 11% silicon alloy that is formed in a forging press. Forging aluminum gives a superior strength and structural integrity on a molecular level; after which it is fully machined. The combination of this alloy and the forging process allows the piston to flex under detonation; or pre-ignition; giving the best resistance to cracking. Although 4032 has a low expansion rate; it is higher than the cast Hypereutectic. Therefore forged KB pistons will require about .001″ wider piston to wall clearance. Pistons are sold as sets; complete with wrist pin retaining rings; wrist pins and piston rings. Please note that all KB forged pistons come equipped with offset wrist pins / piston pins. There is a front and rear section on the piston and it is necessary to install it in the correct way. Please refer to the installation instructions; as provided with each pi