Toyota Sienna Engine Valves

Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.

Nakamura manufactures intake and exhaust valves in forged and hot-extruded versions in a multitude of materials that meet or exceed OE specifications.

Product Features:

• OE Quality
• Heat and corrosion resistant
• Chromium plated or nitrided
• Stem optimized to resist wear

DOKURO use high quality materials and manufacture all engine valves in Japan. Then, as proof of high quality, DOKURO forge Made in Japan is on all valves. The materials available for DOKURO valve applications include carbon steel alloys, stainless steels, inconel, and titanium. Steel alloys such as SUH 3 or SUH 11 are used in most intake valves due to their strength, operating temperatures, relatively low cost, and the fact that they can be hardened at the valve tip for durability. Exhaust valves are made of SUH 35 stainless steel which offers greater high temperature strength and corrosion resistance.

Product Features:

• OE Quality – Made in Japan
• High quality carbon and stainless steel alloys
• High temperature strength
• Corrosion resistance

Nakamura manufactures intake and exhaust valves in forged and hot-extruded versions in a multitude of materials that meet or exceed OE specifications.

Product Features:

• OE Quality
• Heat and corrosion resistant
• Chromium plated or nitrided
• Stem optimized to resist wear

DOKURO use high quality materials and manufacture all engine valves in Japan. Then, as proof of high quality, DOKURO forge Made in Japan is on all valves. The materials available for DOKURO valve applications include carbon steel alloys, stainless steels, inconel, and titanium. Steel alloys such as SUH 3 or SUH 11 are used in most intake valves due to their strength, operating temperatures, relatively low cost, and the fact that they can be hardened at the valve tip for durability. Exhaust valves are made of SUH 35 stainless steel which offers greater high temperature strength and corrosion resistance.

Product Features:

• OE Quality – Made in Japan
• High quality carbon and stainless steel alloys
• High temperature strength
• Corrosion resistance

The AE range of high quality valve-train components includes application-specific valves, design and manufactured to OE standards. The top-engine environment is increasingly hostile, due to turbocharging and other techniques for CO2 reduction. Only components that employ OE design expertise, with the latest advanced materials and manufacturing quality, can provide the performance and durability that professional engine technicians demand. Valves are subjected to some of the highest stresses and temperatures in the engine, yet not only must they survive, they must also continue to seal perfectly. As a top-engine expert with a long heritage of innovation, AE provides the answer with high-precision designs. The choice of material is so critical that some AE valves, known as bi-metallic valves, are made from two materials, with the head optimized for strength and temperature resistance and the stem optimized to resist wear.

Product Features:

• OE Quality
• Optimized for strength
• High temperature strength
• Stem optimized to resist wear

DOKURO use high quality materials and manufacture all engine valves in Japan. Then, as proof of high quality, DOKURO forge Made in Japan is on all valves. The materials available for DOKURO valve applications include carbon steel alloys, stainless steels, inconel, and titanium. Steel alloys such as SUH 3 or SUH 11 are used in most intake valves due to their strength, operating temperatures, relatively low cost, and the fact that they can be hardened at the valve tip for durability. Exhaust valves are made of SUH 35 stainless steel which offers greater high temperature strength and corrosion resistance.

Product Features:

• OE Quality – Made in Japan
• High quality carbon and stainless steel alloys
• High temperature strength
• Corrosion resistance

DOKURO use high quality materials and manufacture all engine valves in Japan. Then, as proof of high quality, DOKURO forge Made in Japan is on all valves. The materials available for DOKURO valve applications include carbon steel alloys, stainless steels, inconel, and titanium. Steel alloys such as SUH 3 or SUH 11 are used in most intake valves due to their strength, operating temperatures, relatively low cost, and the fact that they can be hardened at the valve tip for durability. Exhaust valves are made of SUH 35 stainless steel which offers greater high temperature strength and corrosion resistance.

Product Features:

• OE Quality – Made in Japan
• High quality carbon and stainless steel alloys
• High temperature strength
• Corrosion resistance

Nakamura manufactures intake and exhaust valves in forged and hot-extruded versions in a multitude of materials that meet or exceed OE specifications.

Product Features:

• OE Quality
• Heat and corrosion resistant
• Chromium plated or nitrided
• Stem optimized to resist wear

The AE range of high quality valve-train components includes application-specific valves, design and manufactured to OE standards. The top-engine environment is increasingly hostile, due to turbocharging and other techniques for CO2 reduction. Only components that employ OE design expertise, with the latest advanced materials and manufacturing quality, can provide the performance and durability that professional engine technicians demand. Valves are subjected to some of the highest stresses and temperatures in the engine, yet not only must they survive, they must also continue to seal perfectly. As a top-engine expert with a long heritage of innovation, AE provides the answer with high-precision designs. The choice of material is so critical that some AE valves, known as bi-metallic valves, are made from two materials, with the head optimized for strength and temperature resistance and the stem optimized to resist wear.

Product Features:

• OE Quality
• Optimized for strength
• High temperature strength
• Stem optimized to resist wear

The AE range of high quality valve-train components includes application-specific valves, design and manufactured to OE standards. The top-engine environment is increasingly hostile, due to turbocharging and other techniques for CO2 reduction. Only components that employ OE design expertise, with the latest advanced materials and manufacturing quality, can provide the performance and durability that professional engine technicians demand. Valves are subjected to some of the highest stresses and temperatures in the engine, yet not only must they survive, they must also continue to seal perfectly. As a top-engine expert with a long heritage of innovation, AE provides the answer with high-precision designs. The choice of material is so critical that some AE valves, known as bi-metallic valves, are made from two materials, with the head optimized for strength and temperature resistance and the stem optimized to resist wear.

Product Features:

• OE Quality
• Optimized for strength
• High temperature strength
• Stem optimized to resist wear

DOKURO use high quality materials and manufacture all engine valves in Japan. Then, as proof of high quality, DOKURO forge Made in Japan is on all valves. The materials available for DOKURO valve applications include carbon steel alloys, stainless steels, inconel, and titanium. Steel alloys such as SUH 3 or SUH 11 are used in most intake valves due to their strength, operating temperatures, relatively low cost, and the fact that they can be hardened at the valve tip for durability. Exhaust valves are made of SUH 35 stainless steel which offers greater high temperature strength and corrosion resistance.

Product Features:

• OE Quality – Made in Japan
• High quality carbon and stainless steel alloys
• High temperature strength
• Corrosion resistance

Nakamura manufactures intake and exhaust valves in forged and hot-extruded versions in a multitude of materials that meet or exceed OE specifications.

Product Features:

• OE Quality
• Heat and corrosion resistant
• Chromium plated or nitrided
• Stem optimized to resist wear

Nakamura manufactures intake and exhaust valves in forged and hot-extruded versions in a multitude of materials that meet or exceed OE specifications.

Product Features:

• OE Quality
• Heat and corrosion resistant
• Chromium plated or nitrided
• Stem optimized to resist wear