39mm Fork Tube 4 5 Extension for Harley Davidson Dyna Glide Sportster FXD XL Motorcycle Accessories & Parts _x000D_ _x000D_ _x000D_ Attributes: _x000D_ _x000D_ This listing is for one pair (two pieces) of fork tube extensions for 39mm Harley Davidson fork tubes. _x000D_ The tops are slightly domed for an attractive flush mount at the top. _x000D_ These work in conjunction with Stock Triple Trees and Stock Springs and add 4" OR 5" to the fork tube length to raise and lengthen the front end. _x000D_ They could also be used to adjust for a stretched or raked frame. _x000D_ They are direct screw in replacements for the stock tube tops. _x000D_ They are machined out of Stainless Steel on a precision CNC lathe. _x000D_ These have a 1/4" hole drilled into the side to aid in assembly, which is hidden by the top triple tree. You can also use a strap wrench. _x000D_ _x000D_ Note: _x000D_ _x000D_ If you have a Sportster with the Factory Gas Assist suspension,a threaded insert is required for the factory suspension in one fork tube. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_