These valves are 1MM larger than stock, great for ported street heads that don't need the huge oversized valves. The black nitride valves are stainless steel valves with a multi-stage heat treatment and stress relieving process performed on them. They are used to greatly improve the longevity of the valve and engine. Additionally, unmatched overall dimensional tolerances are used to ensure consistency in the assembly clearances. These valves will work with the stock seats once a performance valve job has been performed. It is highly recommended to unshroud the valve with a bowl and chamber port work when using oversized valves.
NOTE: Sold individually.
Contact our Tech Support Line for further information at 928-855-6341.
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