Supertech Stainless Steel Black Nitride Exhaust Valves for a 1990-1993 Mazda Miata 1.6L

Supertech exhaust valves for Mazda B6 DOHC Miata applications are designed for racing reliability and high-RPM use. Key specs: Material: stainless steel 23-8n, Head diameter: 26.20mm (std), Stem diameter: 5.94mm, Overall length: 105.35mm, and Groove: single groove. Manufactured from heat-resistant alloys engineered for the extreme thermal loads of high-output and turbocharged applications. Built for racing reliability and long service life under boost. For a complete valvetrain refresh, pair with matched Supertech intake valves, valve springs, retainers, valve guides and stem seals. Inconel and sodium-filled options are available for the most thermally demanding applications. Verify valve-to-piston clearance and installed spring height during assembly. Backed by Supertech's reputation for valvetrain precision and racing reliability.

Engine Specs for Standard Size

Groove Type: Single Groove
Length: 105.35mm
Stem Diameter: 5.94mm
Material: stainless steel 23-8n
Head Diameter: 26.20mm (std)

Engine Specs for Oversized (+1MM)

Groove Type Single Groove
Length 105.35mm
Stem Diameter 5.94mm
Material stainless steel 23-8n
Head Diameter 27.20mm(+1.0)