+1MM Intake Valve
(Nitride / 38.50MM)
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.
Features:
- Swirl-polished for max airflow
- Lighter than factory steel valves
- Undercut stem increases flow rates
- Hardened tips for longer valve life
- Back-cut angle for better flow rates
- One piece forged valve (non-magnetic)
- Larger diameter for increased flow rates
- Improves durability and reduces carbon build up
- May be used with factory valve guides and seals
- Black Nitride for superior hardness keeping core ductility
- Unmatched valve seat eccentricity for better sealing & durability
- “Superfinish″ valve stem with a surface roughness of about 1/3 of a regular valve
NOTE: Sold individually.
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- 2005-2023 2TR 2.7L Engines