Honda OEM VTEC Lost Motion Assemblies 14820-PCB-003 – H22A / NSX

Honda OEM VTEC Lost Motion Assemblies 14820-PCB-003 – H22A / NSX

The Honda OEM VTEC Lost Motion Assemblies 14820-PCB-003 are factory VTEC components designed for high-performance Honda engines, including the H22A found in the Accord Type R and Prelude, as well as selected Honda NSX engines equipped with later-generation VTEC valvetrain assemblies. These lost motion units ensure proper engagement of the high-lift VTEC cam lobes, stabilizing the rocker arms at high RPM and preventing the common issues associated with worn VTEC components such as VTEC ticking, erratic VTEC engagement, loss of top-end power or metallic noise from the cylinder head.

This is a genuine Honda OEM part, engineered specifically for VTEC rocker assemblies, providing perfect fitment, correct oil pressure behavior and long-term durability. It is not an aftermarket replacement — it is the same component used in factory-built H-series performance engines.

Compatibility – Accord Type R, Prelude, NSX (verified)

The lost motion assemblies 14820-PCB-003 are used in the following engines:

• Honda Accord Type R (CH1) – H22A7
• Honda Prelude 1998–2001 – H22A5, H22A8
  Note: 1997 Prelude uses the earlier design 14820-PCB-305.
• Honda NSX (2000–2005)
  Compatible with selected later-spec cylinder heads used in both late C30A (NA1) and C32B (NA2) engines. Earlier NSX engines (1990–1999) used a different lost motion assembly design.

Since NSX models vary significantly between markets (JDM, US, EU), VIN or cylinder head code verification is recommended for 100% correct matching.

Older Version – 14820-PCB-305 (Early H-Series)

Earlier H-series engines used a previous generation of VTEC lost motion assemblies, part number 14820-PCB-305. These units differ in construction and are not interchangeable with PCB-003. If you are servicing an early H22A or working on a 1997 Prelude, the correct part may be the older type:
Honda VTEC Lost Motion Assemblies 14820-PCB-305.

Why Choose Genuine Honda VTEC Lost Motion Assemblies?

• Exact fitment and factory tolerances for H22A and later NSX VTEC valvetrains.
• Smoother and more consistent VTEC engagement at high RPM.
• Eliminates VTEC ticking and high-RPM valvetrain instability caused by worn components.
• Protects rocker arms and camshaft lobes from improper seating.
• High durability under extreme temperature and oil pressure conditions.

For engines such as the H22A7 (Accord Type R), H22A5/H22A8 (Prelude) and later NSX models, proper VTEC lost motion operation is essential for maintaining top-end power, smooth high-RPM transition and long-term reliability. When rebuilding a cylinder head or refreshing the valvetrain, replacing aging VTEC lost motion assemblies with new OEM components is strongly recommended.

FAQ – Honda VTEC Lost Motion Assemblies 14820-PCB-003

1. Do these fit all H22A engines?
No. Early H22A engines use the older design 14820-PCB-305. The PCB-003 version fits H22A7, H22A5 (1998–2001), H22A8, and selected later NSX heads.

2. What are the symptoms of worn lost motion assemblies?
VTEC ticking, unstable VTEC activation, metallic noise at high RPM, hesitation during VTEC crossover or loss of top-end power.

3. Can I mix PCB-003 and PCB-305 in the same head?
No. Each cylinder head is designed for one specific type. Mixing them may cause incorrect rocker arm preload and oil pressure problems.

4. Is this a genuine Honda part?
Yes — 14820-PCB-003 is a factory Honda OEM part, not an aftermarket reproduction.