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The Mahle single piston is specified for Ford big block use with a 4.390-inch bore and 4.300-inch stroke, 6.800-inch rod, 0.990-inch pin and a -3.3cc dish yielding a listed 12.4:1 nominal compression figure. The source identifies this as an individual forged-style piston sized and weighted for high-displacement Ford big block applications.
Mahle MS Ford Big Block 4.390 Bore 4.3in Stroke 6.8in Rod .990 Pin -3.3cf 12.4 CR - Single Piston
