Skunk2 312-05-0200 Lost Motion Assembly Kit for 1990-01 Honda/Acura B-Series VTE

Vehicle Fitment

• 1992-2001 Acura Integra (GS-R / Type R), 1.6 L/1.8 L B16A/B17A/B18C DOHC VTEC
• 1994-2001 Honda Civic Si/Del Sol, 1.6 L/1.8 L B16A/B18C DOHC VTEC
• 1990-2001 Honda CR-X / Integra other B-Series DOHC VTEC applications

Features

• Advanced lost motion spring assembly to replace factory piston-style VTEC rocker mechanism
• Designed to maintain preload on VTEC rocker when VTEC mode is inactive to eliminate rattles and improve durability
• Manufactured from chrome-silicone steel with hardened tips for superior endurance under performance conditions
• Stiffer than OEM assemblies - optimized for upgraded camshafts and high-lift applications
• Direct fit for DOHC B-Series VTEC heads (B16A, B17A, B18C) with no head modifications required
• Pre-load design helps ensure consistent VTEC engagement even under high rpm or extended idle conditions
• An essential upgrade for valvetrain builds that includes upgraded springs, retainers, or aggressive cams
• Helps restore quiet operation of the VTEC rocker and improve reliability in high-performance engines

Specifications

• Kit includes: 8 lost motion spring assemblies (enough for one B-Series 4-cyl DOHC VTEC head)
• Material: Chrome-silicone steel with hardened tips
• Preload pressure: approximately 3% stiffer than OEM ITR assemblies
• Compatible engine series: Honda/Acura B16A, B17A, B18C DOHC VTEC

Included Components

• 1x Skunk2 Lost Motion Assembly Kit (8 spring assemblies for full 4-cyl head)

Product Description

The Skunk2 312-05-0200 Lost Motion Assembly Kit is engineered for Honda/Acura B-Series DOHC VTEC engines, such as the B16A, B17A and B18C found in the Integra, Civic Si/Del Sol and other performance variants. The kit replaces the factory piston-style VTEC rocker preload mechanism with a chrome-silicone steel spring assembly that maintains preload on the VTEC rocker even when the VTEC piston is inactive. This helps eliminate rocker rattle, enhances durability under high rpm or extended idle, and supports performance upgrades such as high-lift camshafts or aggressive valvetrain builds.

By offering roughly 3 % more stiffness than the OE counterpart, this assembly kit ensures the VTEC rocker remains properly loaded, allowing smoother transitions into VTEC mode and improving valvetrain stability in tuned high-rev engines. Installation is straightforward; the kit fits directly into compatible B-Series VTEC heads with no major modifications required when used alongside compatible hardware.

If you are building a B-Series VTEC engine for street or track use, especially with upgraded camshafts, valve springs or retainers - the 312-05-0200 kit provides a foundational upgrade to the VTEC mechanism. Always verify head type, valve train configuration and compatibility with your cam/inc barrel setup before installation. Fitment covers the years and engine codes listed; coverage beyond these years or series is unconfirmed at time of listing.