DENSO K20TT Spark Plug

Marsoni

M251S

$28.99

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

DENSO K20TT Spark PlugOverview If you are looking for a highly ignitable, high quality, durable spark plug without the costs usually associated with high performance plugs, then look no further. A true world first, DENSOs patented twin tip (TT) spark plugs feature a nickel centre and a twin protruding ground electrode with a slimmer 1. 5mm diameter. Specifications Specification Value Electrode Gap [mm] 1 Plug Type ID Nickel TT Diameter [mm] 14 Reach [m] 19 Terminal Type

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I used it to set up some extra pods on the back of my truck, and having that full 20 feet of length made it so much easier to route everything cleanly without having to splice in extra wire. The 16-gauge copper feels heavy-duty and is protected by a thick PVC jacket that seems like it’ll hold up well against heat and the elements. It’s a simple plug-and-play setup that saved me a ton of time, and the connections snap together with a really solid, secure click. If you’re doing a custom lighting build on a larger vehicle or a boat, this kit is a total lifesaver for keeping your wiring looking professional and staying reliable.

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Reviewed in the United States on February 20, 2026

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Kenneth Harris

West Palm Beach, US

★★★★★ 4

Wiring

Size: 16AWG -20FT 2Pcs

Great wires

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Reviewed in the United States on May 3, 2026

Verified Purchase