These strengthened valve springs have been designed for use in conjunction with Mugen`s N1 ECU which has raised the rev limit from standard.

The Double Valve Spring Set consists of four sets of eight valve springs.

-Intake: 8 Outer Springs, 8 Inner Springs

-Exhaust: 8 Outer Springs, 8 Inner Springs

*For Race use only

Compatible Vehicle Models:

-DC5 Integra Type R

-EP3 Civic Type R

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