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Brian Crower's high‑mileage valve spring and retainer kit for the Nissan KA24DE includes dual springs with steel alloy retainers and seats designed to renew valvetrain performance. Targeted at engines with elevated mileage, the kit replaces aging components to restore spring force and seating reliability, providing a practical refresh for engines requiring durable spring hardware without altering core valvetrain geometry.
Brian Crower Nissan KA24DE - High Mileage Dual Spring and Steel Alloy Retainer/Seat
