Looking for a replacement for the ACDELCO S121XL? This spark plug is part of ACDELCO's spark plugs lineup. Partflux has identified 16 cross-reference alternatives, including the AUTOLITE 2755 and the BOSCH X4CS.
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Specifications
Specifications are still being gathered for this part. Check back soon.
Looking for detailed specs? Try a cross-reference equivalent below — they may have more information.Looking for detailed specs? Check the cross-reference equivalents — they may have more information.