First off it is adjustable from 6.00" down to 2.00". How this is possible is at the cam cover mount the racer simply loosens the two pinch bolts pops the tube and shortens the shaft and tube slap it back together tighten the pinch bolts and you are done. With the pinch bolts this allows the racer 360 degrees of rotation to get the pump inlet and fuel pump shut off set in the exact spot you like.
On the fuel pump end it is machined to use a bolt on or quick release fuel pump and the extension has the hole pattern for Waterman, Enderle, Rage, Hilborn, DSR, or most other mechanical fuel pumps that are used in the racing industry.
Drive shaft is made from heat treated chrome moly steel which is adjustable for bolt on or quick release fuel pumps by simply removing the spirolox and changing the offset of the female coupler on the extension.
All parts are machined from billet alum. and all parts use O-rings to seal on the mating surfaces.