5.3/LS3 Small Bore | Factory Mast | As Cast | Cylinder Head - Single Bare

5.3/LS3 Small Bore | Factory Mast | As Cast | Cylinder Head - Single Bare

Marsoni

M251S

$457.48

Get it in 3 business days with 1 day shipping. Friday, May 29

5.3/LS3 Small Bore | Factory Mast | As Cast | Cylinder Head - Single BareIntroducing one of the first 5. 3 Liter LS3 cylinder heads designed for use with the LS3 intake without adapters. Optimized for 3. 780 bore diameter. ***Download the Tech Sheet Here*** We launched our Factory Mast product line to deliver an economical product line for our customers. You have come to love the "Black Label" Cylinder heads, but now you can get the same quality at a lower price without SACRIFICING performance. Manufactured using permanent

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Exchange/Return Notes

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Reviewed in the United States on December 31, 2025