Red Line Engine Break-In Additive - 16oz.

Red Line Engine Break-In Additive - 16oz.

Marsoni

M251S

$100.74

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

Red Line Engine Break-In Additive - 16oz.Red Line Engine Break In Additive 16 oz Case of 12

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I'm not a man, but I'm a nonbinary person with a big bottom and have tried many quality boxer brands over the years (including the unisex brands). These are my absolute favorite brand of boxers. They're super comfortable. It's taking me a while because I just keep forgetting to stock up but they are replacing all of my other boxers.

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Reviewed in the United States on March 8, 2026

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Sara meow

Lowell, US

★★★★★ 3

Too large

Size: Medium, Color: Burgundy,lake Blue,dazzling Blue,bijou Blue

Nice but medium size was just too large. Suggest ordering one size smaller.

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Reviewed in the United States on February 20, 2026

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Steve

Battle Creek, US

★★★★★ 5

quality fabric and custom fit

Size: Large, Color: Cerise,orange,yellow,light Blue

excellent fit and fabric. This is my second order of this product

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Reviewed in the United States on February 25, 2026

Verified Purchase

Safety Guy

Grantham, US

★★★★★ 5

Good fitting support !

Size: Medium, Color: White

Just what the man needed. Very good contoured support. No jostling. Not a loose potato sack after an hour of wearing this. Highly recommended. Compare? Hanes, for example. Even the Jockey brand. Put those on, they're tight fitting, seemingly supportive. But they're not. They aren't contoured to fit. That's the whole idea. Contoured, to fit. And stay fitted. The trunk type, just like this wirarpa, and in half an hour it's loose loose loose fitting. A potato sack. No support. No support at all. That's not what a trunk brief is supposed to do. It's supposed to support, give comfort and confidence, stay in place feeling. Assuredness. And this wirarpa Mens Trunk does the job ! Wash and wear and wash and wear. Stays in shape, never gets stretched out and loose, for the fit.

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Reviewed in the United States on May 29, 2024