Hard Blok Water Jacket Filler
Hard Blok Water Jacket Filler
Have you ever heard of cylinder wall flex? Did you know that even on a typical street engine there could be over 1000 PSI of pressure during the compression stroke? Race engines over 5000 PSI? You can stop cylinder wall flex with Hard Blok water jacket filler. The result – better ring seal and more horsepower.

  • Fills the smallest spaces in the water jackets
  • Does not shrink or pull away from the walls
  • Does not expand
  • Remains stable at all operating temperatures
  • Used by winners in drag racing and tractor pulling for more than five years. Now proving to help in circle track

     
Part #
Manufacturer
Product Name
Price
HNH860228
Hard Blok
Hard Blok Water Jacket Filler - Tall Fill
$84.25
HNH860212
Hard Blok
Hard Blok Water Jacket Filler - Short Fill
$69.95