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The Mahle single forged piston is specified for 420ci SBC applications and supplied as an individual piston for engine assembly and balancing. It fits a 4.155 in bore with a 3.875 in stroke and uses a 6.000 in rod length and 0.927 in wrist pin. The piston has a 4.0 cc dish, weighs about 470 g and supports a factory-noted compression range near 13.4–13.5:1.
Mahle MS Piston Set SBC 420ci 4.155in Bore 3.875in Stroke 6.0in Rod .927 Pin 4cc 13.4 CR - Single
