LS3 Medium Bore | Factory Mast | CNC Ported | Cylinder Head - Single Bare

LS3 Medium Bore | Factory Mast | CNC Ported | Cylinder Head - Single Bare

Marsoni

M251S

$800.00

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

LS3 Medium Bore | Factory Mast | CNC Ported | Cylinder Head - Single BareWe took the Factory Mast LS3 and CNC ported it for even more improvement. Our Factory Mast Cylinder Head starts out with our "as cast" port which we now offer a CNC port for more airflow. This allows for an additional option and price point over our As Cast Port version and our Premium Black Label LS3. ***Download your Cylinder Head Technical Sheet here*** We launched our Factory Mast product line to deliver an economical product line for our

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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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I love this black backpack. It has gold zippers and brown accents and it has a pocket in the front two on the side three inside and a pocket on the back of the laptop pocket. I have a disability and have to carry extra stuff so this is a perfect size for me to wear in my back every day. It’s black nylon so it should stay clean. I tend to drop things. I think this will be great, but even without a disability, this is a great backpack. It’s so cute.

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Reviewed in the United States on October 7, 2025

Verified Purchase

Rachel Fitzpatrick

Natrona Heights, US

★★★★★ 5

Perfect day bag!

Color: Upgrade-black, Size: 15.6 Inch

Super convenient and lightweight. I used it for two back-to-back conferences last week and it was PERFECT for what I needed to tote along all day. Fits my regular sized computer (15-16 inch) and even held my water bottle (which is larger than a regular plastic water bottle).

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Reviewed in the United States on February 27, 2026

Verified Purchase

L. Casillas

Louisville, US

★★★★★ 5

Great backpack

Color: Upgrade-black, Size: 15.6 Inch

Stylish and lightweight for travel and work. Sturdy, comfortable straps. After trying about 5 different backpacks, I’m keeping this one.

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Reviewed in the United States on May 25, 2026

Verified Purchase

Kana M. Golic

Carnegie, US

★★★★★ 5

Stylish, light (laptop, phone, notebook & pen) +

Color: Upgrade-apricot, Size: 15.6 Inch, Color: Upgrade-apricot, Size: 15.6 Inch

Perfect for work! I use it for laptop, charger and few items necessary at work. I have a few blocks to walk from parking to work location and this bag has replaced last backpack and purse. Much easier to carry one item than two or more. Plus, it has enough room if you need to use it for clothes and toiletries (road-trip) or carry-on.

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Reviewed in the United States on February 12, 2026