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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.
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4.2 ★★★★★
Based on 2202 reviews
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Verified Purchase
Anthony S
Charlottesville, US
★★★★★ 4
Cover too loose.
Size: 300A Fuse Holder
Nice looking, decent quality, versatile for different gauges. My only complaint with this holder is the cover doesn’t stay on very well, bought 3, and all 3 pop off easily, you will need to zip tie on.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 12, 2026
K
Verified Purchase
Kurtiss s.
Belleville, US
★★★★★ 5
Works as it should.
Size: 300A Fuse Holder
I’ve had several of these in my build for over a year now. Zero issues.
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Reviewed in the United States on December 3, 2025
C
Verified Purchase
Clint
Battle Creek, US
★★★★★ 5
Good brand
Size: 300A Fuse Holder
Good product
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Reviewed in the United States on November 5, 2025
Q
Verified Purchase
Quinton
Charlottesville, US
★★★★★ 5
good product
Better then expected
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Reviewed in the United States on April 12, 2026
P
Verified Purchase
Patrick
New York, US
★★★★★ 5
Good bang for your buck, great quality.
Works great. Most of it is metal and works as a heat sink. Came with two fuses and the adapters for smaller or larger Guage wires. Fit very well and easily for our choice of installation and was a great price.
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Reviewed in the United States on May 8, 2025

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