ACDELCO R45XLS

ACDELCO part number R45XLS is a spark plug in the Ignition system. This catalog matches it to 74 year-and-engine configurations from 1947 to 1977.

Verified fitment includes 1977 American Motors Matador 4.2L 258cid L6 ; 1977 American Motors Matador 5.9L 360cid V8 ; 1976 American Motors Gremlin 5.0L 304cid V8 ; 1975 American Motors Matador 5.9L 360cid V8 ; 1974 American Motors Ambassador 5.0L 304cid V8 , plus 69 other configurations. See every vehicle this part fits.

Manufacturer specifications
ProfessionalConventionalPre-Set Gap: 0.040"
Original Equipment-Recommended Gap: .035
Application data published for:
🇺🇸 US 🇨🇦 CA

Frequently Asked Questions

What is ACDELCO R45XLS?

ACDELCO part number R45XLS is a spark plug with published application data for 74 vehicle configurations from 1947 to 1977. Use the manufacturer part number to cross-reference your old part or a repair quote before you order.

Which vehicles does ACDELCO R45XLS fit?

This catalog matches R45XLS to 74 year-and-engine configurations from 1947 to 1977. Open the compatible-vehicles list for every make, model and engine, and read the notes for position or trim qualifiers.

Is ACDELCO R45XLS OEM or aftermarket?

What matters is the published application data for this part number, not the label on the box. ACDELCO R45XLS is listed with its manufacturer part number so you can compare it to an OEM number or another brand that covers the same fitment.

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