Home / Champion 821 Copper Plus Spark Plug 821M L77JC4 - 4 Pack
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Champion 821 Copper Plus Spark Plug 821M L77JC4 - 4 Pack
$22.77
Free shipping on all orders.
Qty In Stock: 20
The Champion 821 Copper Plus Spark Plug 821M L77JC4 4 Pack is designed for dependable ignition, delivering smooth engine performance and long-lasting durability for automotive, small engine, lawn and garden, and powersports applications. Built for reliable performance and convenient replacement, this item helps support consistent starts and efficient combustion with trusted Champion quality and dependable operation.
Features & Benefits:
🔧 Includes 4 Champion Copper Plus L77JC4 spark plugs for convenient replacement
🔧 Copper core center electrode helps support efficient heat transfer and reliable spark output
🔧 Durable electrode construction resists wear and fouling
🔧 Designed for consistent ignition performance and dependable engine operation
Specifications:
Brand & Part Number: Champion 821 / 821M (L77JC4)
Quantity: 4 Pack
Product Type: Copper Plus Spark Plug
Application: Automotive, small engine, lawn and garden, powersports
Material: Copper core electrode
Plug Type: Standard Spark Plug
Thread Size: 14mm
Reach: 9.5mm (3/8 in)
Hex Size: 13/16 in
Heat Range: 77
Seat Type: Gasket
Choose Champion Copper Plus L77JC4 spark plugs for reliable performance, convenient replacement, and trusted quality—order this 4 pack today!
Shipping Info
Free shipping on every US order. In-stock parts typically ship within 1 business day from Texas.
Returns
30-day returns on unused parts in original packaging. Wrong or defective items are replaced or refunded. See the return policy.
How do I confirm this part fits?
Match the brand and part number to your vehicle, or use the Parts Finder on the homepage. Contact us before ordering if you are unsure.
Are these parts new?
Yes. TXN Supply Co sells new parts from trusted OEM-quality brands — not remanufactured cores.
How fast will my order ship?
In-stock orders ship within 1 business day. Delivery time depends on your ZIP; most US addresses arrive in 2–5 business days.
What is your return policy?
Unused items can be returned within 30 days in original packaging. Customer-initiated returns may include a restocking fee and return shipping.
