SKU: 28407259269

MSD Ignition Coils, Smart Coil, Bigwire, Kit, Red - 8289-KIT

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Description

MSD Ignition Coils, Smart Coil, Bigwire, Kit, Red - 8289-KITOverview: The MSD Smart Coil Big Wire Kit allows you to run dwell time over 5 milliseconds to gain the most of the Smart Coils. It will allow the coil to produce 50,000 peak voltage and peak energy of 190 millijoules, this means you get hotter spark at the plug to burn the maximum amount of fuel in each cylinder to reach the optimal horsepower out of your engine. It is compatible with Holley EFI and many other aftermarket electronic fuel injection

Overview:

The MSD Smart Coil Big Wire Kit allows you to run dwell time over 5 milliseconds to gain the most of the Smart Coils. It will allow the coil to produce 50,000 peak voltage and peak energy of 190 millijoules, this means you get hotter spark at the plug to burn the maximum amount of fuel in each cylinder to reach the optimal horsepower out of your engine. It is compatible with Holley EFI and many other aftermarket electronic fuel injection systems and will run on traditional 12 or 16 volt electrical systems found in race applications. Unique elongated mounting holes accommodate IGN-1A mounting brackets or allow it to bolt in place of an LS coil with 72mm bolt spacing. The MSD Smart Coil will bolt right on to Holley LS cast aluminum valve covers for a super clean look. Available in red or black.

Features:

  • Contains two terminated harnesses with 7-pin connector for easier plug-in to Holley LSx main harness or factory GM LSx harness
  • The harnesses are labeled for different engine types for GM and Ford cylinder banks even Holley universal coil near plug harness
  • More spark energy than any other IGN-1A smart coil on the market for maximum fuel burn during combustion sequence
  • Built-in ignitor for compatibility with Holley EFI and many other aftermarket ECU's
  • Maximum operating voltage of 17 volts - for compatibility with both 12 volt and 16 volt electrical systems found in many performance/race applications
  • Same wiring pinout as other IGN-1A coils for easy plugin upgrades
  • Elongated mounting holes to allow direct replacement of IGN-1A coils and will bolt in place of factory LS 1/2/3/6/7 coils with 72mm bolt spacing
  • Direct bolt-on to Holley cast aluminum LS valve covers with 72mm bolt spacing
  • Available in red or black to match your build

 

Application:

Year Make Model Submodel Engine Size
Universal

 

Specs:

Brand MSD
Coil Type Smart Coil
Color Red
Emission Code 4
Inductance 5.2 mH
Maximum Voltage 50,000 Volts
Peak Current 201 mJ
Primary Resistance .55 Ohms
Product Type Coil
Quantity 8-pack
Turns Ratio 2.87569444444444
Warranty Limited 1 Year Warranty
Shipping Notes
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Exchange/Return Notes
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SKU: 28407259269

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4.2 ★★★★★
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Lina
New York, US
★★★★★ 5
Fabulously bizarre and effective
These silicone socks have to be the strangest item I have ever ordered from Amazon. However strange they are, I was pleasantly surprised with them. My order came with two pairs, and I took one pair out to wash before use. I laughed at handling them then because they were a cross between hospital socks and leftover mannequin skin…trippy. The socks dried fast, so I put on foot lotion and put the socks on. The socks are beige skin tones that cover the entire foot up to the ankle, basically booties. The silicone is very soft and makes putting on and taking off the socks easy. They are also surprisingly easy to walk around in because the bottoms have grips, again, like hospital socks. I walked on tile, hardwood, and carpet with no slipping. The booties also stayed in place with no issues. I was concerned my feet would sweat, but that didn't happen. I was able to wear them for 3 hours without sweaty feet. When I took them off, my feet were a lot more soft than before or if I had used regular socks. For reference, my feet are not terrible, but the skin around my toes is dry and peeling from my picking(gross, I know). The socks I got are a size large, which worried me because they are big, but the site said for my shoe size (9) that's what I should order, and they were right. They are the perfect size and stretchy for room. I can't believe how cool and well-thought-out these socks are, on top of working. Honestly, these are among the top 20 favorite items I've ordered from Amazon. They may look incredibly strange, and they are, but they work wonders.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 5, 2025
A
Verified Purchase
Amazon Customer
Lowell, US
★★★★★ 3
Not well made
I have used these for 2 weeks now and one of them has a hole in the sole... I won't ever buy them again
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 15, 2025
K
Verified Purchase
K. Davis
San Leandro, US
★★★★★ 5
Works for foot psoraisis
Size: 2 pairs black L
Got these for work (service industry) to reduce issues with psoriasis and blisters while putting on 20k+ steps a day. Over time the wounds healed and I could work without so much pain. I now don't use them all the time like I used to, only when a new lesion or blister appears, too prevent a breakout. Tip: if you're not in full breakout, wear thick socks under these as a barrier to friction.
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Reviewed in the United States on April 28, 2026
K
Verified Purchase
Kim C
Draper, US
★★★★★ 4
Work well but run small
Size: 1 pair black L
They do seem to run a bit small. I bought them for my bf but snagged them from him because I couldn’t resist! I’m about a W8/12 and they were just a little big but unlike others, I just put them on while sleeping and didn’t walk around with them. If you’re just planning on that, they did a great job at sloughing and moisturizing 😎
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Reviewed in the United States on April 25, 2026
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Verified Purchase
Aaron Duncan
Louisville, US
★★★★★ 5
Good socks they work.
Size: 2 pairs black L
I normally wear size 13&half to 14 men's, and these fit me ok. They sit just below the ankle. They can get a little tight for me so you should look out for that if you are on the thicker side. But they work as advertised and help moisturize your feet. I recommend wearing them if you're going to just be hanging around home for a bit in one spot as they can be a little slippery to walk in if you go fast. Would not recommend going up and down stairs.
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Reviewed in the United States on August 28, 2025

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