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Best-Selling Spark Plugs
Top-rated spark plugs from the brands mechanics trust — ready to ship today.
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Autolite 25 Copper Core Spark Plugs - 8 Pack
$40.77
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8 Pack Genuine GM ACDelco R45S Spark Plugs 19362366
$33.77
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8 Pack GM ACDelco #6 RAPIDFIRE Platinum Spark Plugs
$62.77
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8 Pack NGK V-Power 4177 Spark Plugs TR6
$42.77
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Champion 828M Marine Spark Plug QL77JC4 - 4 Pack
$30.77
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NGK BPR4ES Spark Plug - 4 Pack
$23.77
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NGK 2983 Spark Plugs CR6HSA Spark Plug - 2 Pack
$16.77
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Champion 71 Copper Spark Plug 71S 71G RC12YC - 8 Pack
$36.77
Your Trusted Source for Quality Auto Parts
At TXN Supply Co, we're passionate about keeping your vehicle running at its best. With over 20,000 parts in stock from the brands you trust — NGK, Champion, ACDelco, Motorcraft, and more — we have everything you need to get the job done right.
Free shipping on every order. No minimums. Just great parts at great prices.
Shop All PartsWhat Our Customers Say
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"Fast shipping, great prices!"
Ordered NGK plugs on Monday and they arrived Wednesday. Fit perfectly on my F-150. Will definitely order again!
— James...., Orlando, FL
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"Huge selection, easy to find parts"
Found exactly what I needed for my Chevy Silverado. The search made it easy and the price was better than the auto parts store near me.
— Maria...., Houston, TX
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"My go-to for auto parts"
I've ordered from TXN Supply Co three times now. ACDelco filters, Champion spark plugs — always OEM quality, always fast. Highly recommend.
— Tom W...., Cupertino, CA
From the Auto Parts Blog
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September 08, 2026
How to Cross-Reference an OEM Oil Filter or Spark Plug Number
Oil filters are not interchangeable by thread size alone. Bypass valve pressure, anti-drainback, and canister height change by engine. PF63 versus PF63F is a letter that can mean
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September 07, 2026
Iridium vs Copper Spark Plugs for Daily Drivers
Iridium vs Copper Spark Plugs for Daily Drivers is a comparison of catalog numbers and applications, not a popularity contest. the first brand and the second brand can both be
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September 06, 2026
DIY Tune-Up Guide: Spark Plugs, Filters, and Fluids
A modern tune-up is still plugs, air and cabin filters, and a look at boots and wells. It is not a distributor and points. Do the inspection in one afternoon so you do not replace