If you’ve installed a twist style linkage from Empi, Scat, or Vintage speed and have interference with the operating rod hitting the cylinder tin, these spacers may solve the issue. The 1/4″ thick spacers are supplied with a pair of 34 ICT gaskets. Zinc plated steel. These spacers could also be used with Type-3 or Type-4 applications where the carbs need a little lift. Made in USA.