ACDelco spark plugs R45TS 8-pack — copper-core, corrosion-resistant black onyx finish

ACDelco R45TS Pkg 8 is a box of eight copper-core spark plugs designed for dependable ignition performance, corrosion resistance, and suitability in marine and standard automotive applications, now offered with a rebate.

This eight-pack of ACDelco R45TS spark plugs delivers a balance of heat transfer, electrode protection, and anti-corrosion finishes intended for routine engine ignition needs. Each plug combines a copper thermal core for efficient heat handling with a nickel-chrome sheathed center electrode and a black onyx outer coating to resist environmental wear. The kit is presented as a value pack and includes a manufacturer rebate plus an additional $4 incentive, making it practical for maintenance, tune-ups, or multi-vehicle households.

How do these plugs resist corrosion and wear?

ACDelco uses surface treatments and durable sheathing so these plugs maintain reliable contact and service life in demanding conditions. The black onyx finish shields the shell from rust, while the nickel-chrome layer protects the center electrode from oxidation and gradual erosion.

• Black onyx coating minimizes external corrosion on the plug housing
• Nickel-chrome alloy sheathing guards the center electrode from oxidation
• Protective finishes help preserve gap integrity and firing consistency

Why does a copper-core matter for ignition performance?

The copper core serves as an effective thermal conductor, moving heat away from the firing tip so the plug operates within its intended temperature range. That heat management supports consistent spark behavior, reduces the chance of fouling, and can extend service intervals when installed correctly.

• Copper thermal core improves heat transfer from the firing tip
• Better temperature control lowers risk of carbon deposit buildup
• Enhanced durability for typical driving cycles and tune-ups

Are these plugs appropriate for marine engines as well as cars?

Yes — ACDelco lists these plugs as suitable for certain marine applications in addition to standard automotive use. The corrosion-resistant coatings and robust electrode construction make them a reasonable choice for engines exposed to moisture and harsh environments, but always confirm compatibility with the engine manufacturer’s recommendations.

• Manufacturer indicates availability for specified marine applications
• Anti-corrosion coatings help in damp or salty operating conditions
• Check engine specs for correct heat range and thread fitment

What comes in the package and how does the rebate work?

This listing includes a sealed box containing eight new ACDelco R45TS spark plugs. The purchase is promoted with a manufacturer rebate and an additional $4 back, improving overall value. Follow the rebate instructions provided by ACDelco for submission deadlines and required proof of purchase.

• Box of 8 new ACDelco R45TS spark plugs
• Rebate offer from the manufacturer (follow submission steps)
• Extra $4 incentive applied as described in the offer terms

Who is this for: The ACDelco R45TS Pkg 8 is aimed at DIY mechanics, fleet owners, and automotive technicians who need a cost-effective, corrosion-resistant spark plug option for routine maintenance across multiple vehicles. It’s also suitable for boat owners with compatible marine engines seeking a plug with improved thermal properties and protective coatings. Always verify thread size, reach, and heat range against the engine’s service manual before installation to ensure proper fit and performance.