Mars Tuck & Run Valve Springs 10.8 lbs Pair

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Out of stock
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  • This is a copy of a stock valve spring, made from a special material that has been manufactured to right at 10.8 lbs at .850".
  • Most importantly, it has as much as 4 lbs more pressure at max lift (.600", known as "nose pressure") than other "trick" springs.
  • It meets all Box Stock rules and will outperform any other spring on the market today that will pass tech.
  • Comes as a set of 2 springs.
  • EB - Engine Builder (These springs may need to be surfaced and/or fully compressed before install to meet certain sanction rules.