Holley EFI Systems Wiring Harnesses

Marsoni

M251S

$283.98

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

Holley EFI Systems Wiring HarnessesThis part is legal for sale or use on Racing Use Only Vehicles The following vehicles are considered Racing Use Only Vehicles: Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street. This harness is designed for LS1 6 Engines, from 1997 2004. This harness interfaces with 24x Crank and 1x Cam sensors.

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The shirt itself is decent quality and looks good, but the fit wasn’t great for me. If you’re a big and tall guy, this may not be the best option. The material has some stretch and feels comfortable, but the overall cut runs smaller and doesn’t offer much room in the shoulders or torso. It works better for slimmer or more standard builds. If the sizing works for you, it’s a nice-looking shirt. Just be aware that it’s not very forgiving in the fit if you need extra room.

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Reviewed in the United States on December 31, 2025

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Dalton Taylor

West Palm Beach, US

★★★★★ 5

Good value

Color: A-white, Size: X-Large

Great shirt for the price! Lightweight, comfortable, and the fit is true to size. Non wrinkle material, Great for golf/athletic shirts or blanks for dtf or embroidery.

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Reviewed in the United States on April 12, 2026

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Mr Dezo

Battle Creek, US

★★★★★ 5

Clean & classy look, but make sure you buy a size bigger because it runs small.

Color: A-black, Size: 4X-Large

As for sizing, make sure you buy a size up because it runs kinda small, (you’ll thank me!). Quality is good, but the best feature-it has a dress collar polo with some color around the neck and buttons, which gives it a clean and classy look, (which I’m a fan of), the comfort of the polo is about average. I absolutely recommend!

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Reviewed in the United States on April 28, 2026

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xavier s gamble

Lake Worth, US

★★★★★ 5

Good shirt

Color: A-dark Red, Size: 3X-Large

3xl fits like a 2xl almost, good fabric fits well

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Reviewed in the United States on May 9, 2026

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Holland

Chelsea, US

★★★★★ 4

Nice shirt

Color: A-royal Blue, Size: X-Large

This is a decent shirt. It feels nice against the skin and fits like it should. It feels a little cheap, but that could be because it’s thin. Kept me comfortable in Florida heat and humidity!

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Reviewed in the United States on May 30, 2026