Johnson Engine Technology Big Bore Cylinders. We have been installing ductile iron liners into stock Harley Davidson cylinders for decades.  We offer Twin Cam 4” and 4 ⅛” big bore cylinders.  Stay tuned for Milwaukee 8 cylinders  

Twin Cam cylinders 4” or 4 ⅛” Ductile iron liners installed and honed, set up for 117” or 124” - $595 

Twin Cam cylinders Bored and Honed 3 ¾” to 3 ⅞” - $240

Milwaukee 8 Big Bore 4 ¼” ” Ductile Iron Lined Cylinders coming 2/2/2021 

CP Forged Milwaukee 8 / Twin Cam Piston sets - $395

Johnson Engine Technology bores and hones all of our cylinders using the factory datum locations, we can ensure that the cylinder bores are centered over the connecting rod centerline every time. 

Deglaze and Hone cylinders - $95

Hone Cylinder 0.010” oversize - $145