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

We offer a 30-day return/exchange service after receiving.
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I absolutely love my Timex Ironman watches. I have had many over a very long period of time. Wonderful set of functions for the price. Very affordable. Easy to use. Lasts a long time. Very easy to read in standard lighting. I like the Indiglo when needed, but do not use it too often. Absolutely love the ability to set a repeat timer to remind me to do something at a fixed interval, or to keep me on task for a fixed period of time. Great to be able to set three independent alarms. Potential to capture a huge number of splits with the stopwatch. I purchased this watch to replace a similar model with a dead battery. I have replaced batteries in the past, but it is quicker and easier to buy a replacement watch. I am saving my old watches for that day in the future when the Ironman model may no longer be available. I expect this will be my watch of choice for the rest of my life.

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Reviewed in the United States on May 21, 2026

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E-Dub

Alexandria, US

★★★★★ 5

Just fine if you have simple needs...

Color: Black/Digital/Black/Green

Exactly what I needed: a cheap, durable wrist watch. The only thing it was lacking were instructions, but about 5 minutes of messing with the buttons got it set up

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Reviewed in the United States on May 19, 2026

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S S.

Lake Worth, US

★★★★★ 5

Nice watch

Color: Black/Digital/Black/Green

Good watch

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Reviewed in the United States on April 30, 2026

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