This is a INTAKE KIT of 8 intake valves of your specification.

Supertech's stainless valves are made of SAE EV8 stainless steel, a grade of austenitic stainless with high chromium and manganese content that has been developed specifically for high-temperature valve use. The slight necking-down of the valve stem means there's less blockage of incoming airflow, and the black nitrided finish provides a hard, smooth exterior while the underlying steel structure retains ductility.

Miata 90-93 1.6L DOHC Options:

MAIVN-1100 (HI-FLO)

• Head Diam: 31.00mm (std)
• Stem Diam: 5.96mm
• Length: 105.35mm
• Part Number: MAIVN-1100(hi flo)
• Material: Black Nitrided

MAIVN-1102 (HI-FLO)

• Head Diam: 32.00mm (+1)
• Stem Diam: 5.96mm
• Length: 105.35mm
• Part Number: MAIVN-1102 (hi flo)
• Material: Black Nitrided

Miata 94-05 1.8L DOHC Options:

MAIVN-1204 (HI-FLO)

• Head Diam: 33.00mm (std)
• Stem Diam: 5.97mm
• Length: 102.6mm (+0.6)
• Part Number: MAIVN-1204 (hi flo)
• Material: Black Nitrided

MAIVN-1208 (STD-FLO)

• Head Diam: 33.00mm (std)
• Stem Diam: 5.97mm
• Length: 103.10 (+1.1)
• Part Number: MAIVN-1208 (std flo)
• Material: Black Nitrided

MAIVN-1206 (HI-FLO)

• Head Diam: 34.00mm (+1)
• Stem Diam: 5.97mm
• Length: 102.6mm (+0.6)
• Part Number: MAIVN-1206 (hi flo)
• Material: Black Nitrided