International RM121 Spark Plugs
Your One-Stop Shop For Trusted International RM121 Spark Plugs
If you’re in search of International RM121 Spark Plugs aftermarket or OEM parts, consider your search over! Advance Auto Parts carries 5 Spark Plugs from top brands with prices ranging from $2.49 to $4.99.
Beyond great prices, we stock trusted brands manufacturing all types of Spark Plugs for your International RM121. Of the 3 OEM and aftermarket parts brands we carry, some of the most popular are Champion, ACDelco, and Autolite.
And don’t forget to read customer reviews across all Spark Plugs categories in our catalog. Buy with confidence by leveraging past customer experiences of our aftermarket and OEM parts.
At Advance Auto Parts, we don’t think top quality Spark Plugs have to cost top dollar, and we prove it. Browse our top International RM121 Spark Plugs below, order online to ship to your home, or head into your nearest Advance Auto Parts location to get started.
Essential International RM121 Spark Plugs
Champion – Copper Plus Small Engine Spark Plug Dependable Performance, OE Replacement RJ8C (Part No.871)
from
$2.49
Dependable performance. This Champion® spark plug features a copper core electrode that provides increased conductivity and heat control for good overall wear.
Product Features:
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Product Features:
- Copper Plus – Dependable Performance and Durability
- OE type replacement plug
- Resists fouling
- Copper core center electrode allows for accurate control of heat range for longer life
- Superior corrosion resistance
- Built to ISO and SAE standards for proven performance
Autolite – Copper Spark Plug: Delivers Quick Starts, Good Fuel Economy, Smooth Acceleration (Part No.303)
from
$3.49
With over 100 years of engineering expertise and more than 11 billion plugs sold, Autolite continues to set the standard in spark plug technology. Designed and engineered in the USA, these spark plugs feature a copper-glass seal that bonds the insulator, terminal post, and center electrode together, ensuring full required voltage at the spark gap with a 100% leak-proof, gas-tight seal. The multi-rib insulator reduces the risk of flash-over, while the one-piece terminal post adds strength and durability. Additionally, the built-in resistor minimizes radio frequency interference (RFI) and electrode erosion, making these spark plugs a reliable choice for enhancing your vehicle’s performance.
Product Features:
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Product Features:
- Copper-glass seal bonds insulator, terminal post center electrode together; assures full required voltage at spark gap; gas-tight seal (100% leak proof)
- Multi-rib insulator reduces danger of “flash-over”
- One-piece terminal post adds strength
- Resistor reduces radio frequency interference (RFI) and electrode erosion
- Quick Starts: The Autolite Copper Spark Plug is engineered to deliver quick and reliable starts, ensuring your vehicle is ready to go when you are.
- Good Fuel Economy: Designed to optimize fuel combustion, these spark plugs help improve your vehicle’s fuel efficiency, saving you money at the pump.
- Smooth Acceleration: Experience smoother and more responsive acceleration with the advanced engineering of Autolite Copper Spark Plugs.
Champion – Champion Copper Plus Small Engine- Single Card – J8C (Part No.841-1)
from
$2.99
Dependable performance. This Champion spark plug features a copper core electrode that provides increased conductivity and heat control for good overall wear.
Product Features:
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Product Features:
- Resists fouling
- Superior corrosion resistance
- Dependable and proven performance
- Increased conductivity and heat control for good overall wear
Champion – Copper Plus Small Engine Spark Plug: Dependable Performance, OE Replacement, J8C (Part No.841)
from
$3.79
Dependable Performance, OE Replacement, J8C. This Champion spark plug features a copper core electrode that provides increased conductivity and heat control for good overall wear. Built to ISO and SAE standards, it offers dependable performance and durability. The OE type replacement plug resists fouling and boasts superior corrosion resistance. Its copper core center electrode allows for accurate control of heat range, ensuring a longer life, while the nickel center electrode tip material and flat seat type further enhance its reliability.
Product Features:
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Product Features:
- Copper Plus – Dependable Performance and Durability
- OE type replacement plug
- Resists fouling
- Copper core center electrode allows for accurate control of heat range for longer life
- Superior corrosion resistance
- Built to ISO and SAE standards for proven performance
- Increased Conductivity and Heat Control: The Champion Copper Plus Small Engine Spark Plug features a copper core electrode that enhances conductivity and heat management, ensuring good overall wear.
- Enhanced Reliability: With a nickel center electrode tip material and flat seat type, this spark plug provides enhanced reliability and consistent performance for small engines.
ACDelco – Conventional Nickel Tip Copper Core Spark Plug: Reduces Corrosion & Maximizes Durability (Part No.R43)
from
$4.99
ACDelco Professional Conventional Spark Plugs are designed for reliability and efficient performance, and are a high quality replacement for many vehicles on the road today. Their high-quality copper cores and outstanding suppression characteristics deliver reliable performance. They are also available for Marine applications. These premium aftermarket replacement spark plugs are manufactured to meet your expectations for fit, form, and function.
Product Features:
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Product Features:
- Black Onyx coating helps reduce corrosion
- Copper core provides great heat transfer and helps maximize plug durability
- Ribbed suppressor seal extends resistance and helps prevent spark ‘flash over’ and misfires
- Nickel-chrome alloy sheathing helps prevent corrosion on center electrode
- Available for use in Marine applications
- Some ACDelco Gold parts may have formerly appeared as ACDelco Professional
- Premium aftermarket replacement part
- Manufactured to meet specifications for fit, form, and function for General Motors vehicles as well as most makes and models
- Nickel Center Electrode Tip: Features a nickel center electrode tip for enhanced reliability and efficient performance in various driving conditions.
- Outstanding Suppression Characteristics: Engineered with outstanding suppression characteristics to deliver reliable performance and reduce radio frequency interference.
International RM121 Spark Plugs List
Spark Plugs Brands You Can Trust For Your International RM121
3 trusted brands of Spark Plugs line our shelves, ready to help keep your International RM121 running smooth. Below are some of the most popular brands and their top Spark Plugs offerings:
Popular ACDelco Spark Plugs
ACDelco products for the International RM121 span several categories. Some of the highest-rated ACDelco Spark Plugs that will fit your International RM121 are:
from
$4.99
(2)
Conventional Nickel Tip Copper Core Spark Plug: Reduces Corrosion & Maximizes Durability
Spark Plugs
Top International RM121 Spark Plugs from Champion
Your International RM121 will be purring again thanks to Champion brand Spark Plugs available for online order or in-store pick up. Popular Champion parts include:
from
$3.79
(13)
Copper Plus Small Engine Spark Plug: Dependable Performance, OE Replacement, J8C
Spark Plugs
from
$2.49
(1)
Copper Plus Small Engine Spark Plug Dependable Performance, OE Replacement RJ8C
Spark Plugs
Most Purchased International RM121 Spark Plugs from ACDelco
When you buy the most frequently purchased ACDelco brand Spark Plugs, you can be confident it will be the right part for your International RM121. Here are the ACDelco Spark Plugs Advanced Auto customers buy the most:
from
$4.99
(2)
Conventional Nickel Tip Copper Core Spark Plug: Reduces Corrosion & Maximizes Durability
Spark Plugs
from
$3.79
(13)
Copper Plus Small Engine Spark Plug: Dependable Performance, OE Replacement, J8C
Spark Plugs
from
$3.49
(6)
Copper Spark Plug: Delivers Quick Starts, Good Fuel Economy, Smooth Acceleration
Spark Plugs
