The 551 is an XS Power battery installation accessory. XS Power lists it as: I-BAR Side and Top Terminal Adaptor. The specifications below come directly from XS Power's June 2026 distributor data. Verify voltage, group size, polarity, dimensions, and application requirements before ordering.This Listing Includes: (1) XS Power 551 I-BAR Side and Top Terminal AdaptorSpecifications Model 551 Product Type Terminals, Hardware & Hold-Downs Warranty 1-Year — view warranty (PDF) UPC 692209012856 Package Length 3.75 in. Package Width 2.25 in. Package Height 5.75 in. Package Weight 2 lbs. Available from JS Alternators.PROP 65 WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer or birth defects or other reproductive harm. Wash hands after handling.For more information, visit www.P65Warnings.ca.gov.
