Supertech Black Nitride Intake Valve Set of 8 BRZ / 86 / FR-S 2013-2020 | SIVN-1052-2-8

Product Fitment: 

2013-2016 Scion FR-S

2013-2020 Subaru BRZ

2017-2020 Toyota 86

Built for performance and engineered for longevity, Supertech’s +1mm Oversized Intake Valves are manufactured from an enhanced version of EV8 (21-4N) stainless steel, one of the highest-grade materials available for valve construction. These valves are designed to thrive under high-performance and high-heat conditions, making them ideal for naturally aspirated and turbocharged applications alike.

Precision-forged in a one-piece, non-magnetic design, these valves undergo advanced treatments such as Black Nitride coating and Superfinish polishing, delivering superior strength, reduced friction, and improved flow characteristics. With a +1mm oversize head and undercut stems, you’ll see better airflow and sealing, enhancing both power and efficiency.

Features:

• Head Diameter: 36.00mm (+1mm Oversized)

• Stem Diameter: 5.46mm

• Valve Length: 105.00mm

• Material: Enhanced Stainless Steel 21-4N (EV8 grade)

• Groove Type: Single Groove

• Back-Cut Angle and Undercut Stem for increased flow

• One-Piece Forged Construction (non-magnetic)

• Black Nitride Coating for increased surface hardness and longevity

• Magnetic Friction Welded Wafer, hardened to 52 HRC min

• Superfinished Valve Stems – ultra-smooth surface for lower friction and wear

Performance Benefits:

• Improved airflow and sealing

• Reduced friction for smoother operation and increased RPM capability

• Better durability and wear resistance, even under high-heat conditions

• Less carbon buildup, improving long-term performance

What’s in the Box?

• 8x Supertech +1mm Intake Valves