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

Marsoni M251S
Sale price$457.48
Pay 4 payments of $114.37 a month.Shop Pay
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
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 762 reviews
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Verified Purchase
Prince
Lake Worth, US
★★★★★ 5
Product as described!
Product as described. Nice snug fit for the 325ci!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 8, 2025
K
Verified Purchase
Kevin
Pawtucket, US
★★★★★ 3
Doesn’t fit face lift sedan
Model: E46-4door, Size: Double Slats-Glossy Black
Did not fit 2004 330i sedan is a face lift looks nice
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
F
Verified Purchase
Francisco Diaz Gonzalez
Massapequa, US
★★★★★ 1
Muy grande
No le cae
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 18, 2026
J
Verified Purchase
Jay Hernandez
Carnegie, US
★★★★★ 5
Perfect fit.
Great fitment, very happy.
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Reviewed in the United States on May 18, 2023
B
Verified Purchase
brian S.
Whiting, US
★★★★★ 1
Not good.
Do not fit properly at all. It's loose and wobbly and that is not good.
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Reviewed in the United States on November 5, 2023

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