Jims, Cylinder Torque Plates For Harley-Davidson

Used with 3.4375 "to 4" bore with OEM base pattern; Plates simulate stress conditions when boring and honing, which prevents distortion of cylinders walls eleven cylinders are installed Note: order MCS 519231 bolt kit only separately for Sportster & Buell Fits Models: 66-99 (NU) B.T.; 86-19 XL; 08-12 (UN) XR1200; 87-10 (NU) Buell XB Units: EA