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Hammer Performance 1250 kit Install Part 1

Premium Quality Moly Faced Rings. 030 Multilayer Steel Head Gaskets and. 2007+ models will need a suitable flash tuner device to adjust both fueling and ignition timing. Hammer bolt-on 883 to 1250 conversion kit for 1986-2003 harley sportster hammer performance has put together a tech article to tell you all about converting your 883 to a 1250 or 1275.