Honed Fitted 1000cc Cylinder & Piston Engine Kit 73-85 Harley Sportster Ironhead SPEARHEAD12STP or dive into the ThunderMax

or dive into the ThunderMax software—free to download from our website—to fine-tune AFR maps

2002-2007 TOURING MODELS

Kit includes DIRTY AIR aluminum air shocks

Uses stock bolts and washers

Honed Fitted 1000cc Cylinder & Piston Engine Kit 73-85 Harley Sportster Ironhead SPEARHEAD12STP or dive into the ThunderMaxBRAND NEW PART # 11 2607 Fits: 1973 1985 1000cc Sportster models. Genuine V Twin manufacturing. Cylinder and Piston Kits are honed and pre fitted with pistons and Hastings Rings. They are ready to run and will require breakin as suggested in the appropriate shop manual. This kit is 9: 1 Ratio (stock) Sold in pairs for Order gasket set separately.