Mahle · New
Mahle MS Ford Big Block 4.390 Bore 4.3in Stroke 6.8in Rod .990 Pin -3.3cf 12.4 CR - Single Piston
MPN 930261690-1 · Store SKU mhl930261690-1
$86.09
CHECK AVAILABILITY0 in supplier warehouses. Ask JuiceBuilt about availability.
Supplier stock checked 11/7/2026, 6:42:03 AM UTC. Adding a part does not reserve it.
30-day returns for unopened, unused new parts
Request a return within 30 calendar days after delivery. New parts must be unopened and unused.
Shipping & returns ↗This policy does not limit rights required by law.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,-3.3cc,542g,12.4CR, 2618, SINGLE PISTON Piston (ea) - 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
