Cast Exhaust Manifold - RB25DE 14002-21U00 (Used)

Used Nissan RB25DE Cast Exhaust Manifold | OEM Factory Manifold | Genuine Nissan

Genuine Used RB25DE Exhaust Manifold – Factory Cast Iron OEM Replacement

Replace a cracked, warped or damaged exhaust manifold with this genuine used Nissan RB25DE cast exhaust manifold.

Factory cast iron construction provides excellent durability and heat resistance, making it ideal for OEM replacement, engine rebuilds, and restoration projects. Perfect for maintaining factory exhaust flow characteristics and reliability on naturally aspirated RB25DE engines.

This is a used OEM Nissan component and is sold as a restoration or replacement part.

Features

✅ Genuine Nissan OEM exhaust manifold

✅ Factory cast iron construction

✅ Designed for RB25DE naturally aspirated engines

✅ Excellent heat resistance and durability

✅ Direct replacement fitment

✅ Ideal for OEM restoration or rebuilds

OEM Part Number

• 14002-21U00 (RB25DE exhaust manifold – cast type, may vary by production date)

Please confirm your existing manifold part number before purchase, as RB25DE manifolds can vary slightly between chassis and production years.

Vehicle Compatibility

Suitable for selected:

• Nissan Skyline R33 RB25DE

• Nissan Skyline R34 RB25DE (selected models)

• Nissan Stagea WC34 RB25DE

• Nissan Laurel C34 RB25DE

• Nissan Cefiro A32 RB25DE

Condition

• Genuine used Nissan component

• Cast iron manifold

• Normal heat cycling discolouration and surface wear

• May require light surface cleanup before installation

• Sold exactly as pictured

Perfect For

• RB25DE engine rebuilds

• Exhaust manifold replacement

• Restoration projects

• OEM factory repairs

• Engine swaps and refreshes

What's Included

• 1 × Genuine Used Nissan RB25DE Cast Exhaust Manifold

Only the item shown in the photographs is included.

Important Information

This is a used OEM exhaust component.

Professional installation is recommended.

It is strongly advised to check for cracks, flange warping, and gasket surface condition before installation or reuse.

Need Help Choosing?

Not sure if this manifold suits your RB25DE setup?

Contact the BoostDoc team with your engine code or vehicle model and we’ll help confirm compatibility.

Search Terms

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