LS3 Large Bore | Factory Mast | As Cast Port | Cylinder Head - Single Bare

LS3 Large Bore | Factory Mast | As Cast Port | Cylinder Head - Single Bare

Marsoni

M251S

$524.50

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

LS3 Large Bore | Factory Mast | As Cast Port | Cylinder Head - Single BareLimited QTY. Available >Download Your Cylinder Head Spec Sheet Here< Introducing the Factory Mast "As Cast" Port Cylinder Head. We launched our Factory Mast product line to deliver an economical product line for our customers. We completely engineered and manufactured our long standing best in class CNC port into an "As Cast" port. This new process saves a significant amount of time and manufacturing cost, which is savings we pass down to you. You

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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

My old chair can go in the trash immediately because it set the bar so low (picked up from a giveaway - squeaked anytime it's leaned on, always sinking upon sitting on it). This Ergonomic chair blew it out of the water. Happy with this purchase. This chair took me an hour to assemble, which I expected. It feels extremely sturdy and comfortable. Lumbar support feels great! I love the various adjustability options this chair offers. Hope it lasts for many years. By the way, I am 175 lbs, 5'10".

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Reviewed in the United States on January 3, 2026

Verified Purchase

Denisha

Grantham, US

★★★★★ 5

Great product

Color: Black, Color: Black

The directions were so easy to follow i was able to set up the chair in under an hour its very comfortable and perfect highly recommend

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Reviewed in the United States on March 24, 2026

Verified Purchase

Spencer

Chelsea, US

★★★★★ 5

Good buy

Color: Black

Very comfortable. Solid chair. Lumbar support helps a lot. Posture in this chair is great. Lots of support. Seems like a relatively skinny chair though - I wouldn't imagine it to be comfortable for a larger person.

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Reviewed in the United States on March 4, 2026

Verified Purchase

George

Birmingham, US

★★★★★ 3

Check components for imperfections

Color: Black, Color: Black

Just finished putting the chair together, and while there were some nice touches (gloves to wear while assembling) and manual very easy to understand, there are more steps than are customary for a basic chair. However, two main gripes are (1) bought Saturday for $129.99, today it is listed for $89.99 (2) out of the box, the mesh back of the chair has a small tear in it. Unsure if it will end up being a long-term issue, but irritating all the same.

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Reviewed in the United States on February 24, 2026

Verified Purchase

Melanie

Alexandria, US

★★★★★ 5

Amazing chair

Color: Black

Going from a regular office chair to this majestic heavenly office chair, my body hasn't felt better. As a person who is rather on the large side (6'2, 175 pounds), so this chair good butt cushioning, adjustable armrest, the adjustable headrest made this purchase an very good one. I move constantly on chairs so when i found out tthis chair can adapt to my position with a few tweaks i instantly fell in love. Considering that I have jumped and stood on the chair quite the number of times and it still is holding its form just speaks to its sturdiness. I dont believe in buying extremely expensive chairs as a high quality one like this has everything you could wish for.

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Reviewed in the United States on May 4, 2026