Ferrea Single Valve Spring Kit – Honda Civic Si L15 (2017–2020), 21.35mm OD / 14.98mm ID – 4-Pack

Description

These Ferrea alloy single valve springs deliver precise valve control for high-revving L15 engines, offering consistent spring rate and fitment for 2017–2020 Honda Civic Si applications. Designed as a direct-fit replacement, the springs maintain correct valve geometry with specified 21.35mm OD and 14.98mm ID dimensions, supplied as a balanced set intended for reliable camshaft performance and valvetrain stability during spirited driving and track use.

Features:

• Alloy single spring construction
• 21.35mm outside diameter
• 14.98mm inside diameter
• Direct fit for L15 engines
• Pack of 4 springs

Contents:

• 4 Ferrea alloy single valve springs (21.35mm OD, 14.98mm ID)

Vehicle Fitment:

• 2017–2020 Honda Civic Si L15

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