Supertech Inconel Exhaust Valve Set of 8 BRZ / 86 / FR-S 13-20 | SEVI-1050-2-8

Product Fitment:

2013–2020 Subaru BRZ

2017–2020 Toyota 86

2013–2016 Scion FR-S

Engineered for extreme performance, Supertech sodium-filled exhaust valves are the ultimate upgrade for high-output turbocharged engines. Designed with cutting-edge materials and manufacturing techniques, these valves significantly reduce valve head temperatures, improve durability, and provide greater tuning flexibility—essential for modern turbo applications.

Crafted from Inconel/Nimonic alloy, these valves handle extreme heat far better than standard stainless steel valves. The sodium-filled stems rapidly transfer heat away from the valve head, keeping temperatures in check even under heavy boost. This cooler operating environment increases material strength and allows for more aggressive spark timing, helping tuners unlock more power safely.

Combined with a 10% average weight reduction, these one-piece forged valves also enhance valvetrain response and reduce valve float at high RPM. The result? A lightweight, heat-resistant valve that’s perfect for both street and race applications.

Features:

• Head Diameter: 29.00mm (Standard)

• Stem Diameter: 5.45mm

• Valve Length: 97.7mm

• Material: Inconel-Nimonic Alloy (non-magnetic)

• Groove Type: Single Groove

• Back-Cut Angle & Undercut Stem for improved flow

• Sodium-Filled Stem for optimal heat dissipation

• Magnetic Friction Welded Wafer, hardened to 52 HRC min

• "Superfinish" Valve Stem – ultra-low surface roughness for reduced friction

Benefits:

• Up to 10% weight reduction

• Significantly lower valve head temperatures

• Improved material strength and longevity

• Greater spark timing flexibility for tuners

• Enhanced valvetrain stability at high RPM

What’s in the Box?

• 8x Supertech Sodium-Filled Exhaust Valves