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Mahle MS Piston Set BBF 544ci 4.39in Bore 4.5in Stroke 6.7in Rod 0.990 Pin -38cc 9.7 CR Set of 8

Manufacturer reference photos may show other components. Your order includes the sale unit described here.

Mahle · New

Mahle MS Piston Set BBF 544ci 4.39in Bore 4.5in Stroke 6.7in Rod 0.990 Pin -38cc 9.7 CR Set of 8

MPN 930245690 · Store SKU mhl930245690

$936.51

Sold as one set of 8.

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Supplier stock checked 11/8/2026, 3:41:06 AM UTC. Adding a part does not reserve it.

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Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.

Product details

521cid 4.390 x 1.350CH, 4.300stroke,6.800rod,0.990pin,-38cc,506g,9.3CR, 4032 Piston (set) - BIG BLOCK FORD

Manufacturer fitment & guides

  • Ford Big Block 521 cu in.
  • Manufacturer-supplied application summary from Turn14; this may not be an exhaustive fitment list.

A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.

Part-specific notes

  • Not CARB approved. Destination and intended-use restrictions must be checked before sale.
  • Emissions acknowledgement required before purchase.
  • California Proposition 65: Y
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