Looking for a replacement for the DENSO 3521? This spark plug is part of DENSO's spark plugs lineup. If the DENSO 3521 is unavailable, 7 verified equivalents are available from brands like DENSO, HARLEY-DAVIDSON, NGK.
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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.