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NAPA Coil Spring

Choose from a huge range of fast moving coil springs in the NAPA portfolio, which reflect the most popular applications in the UK market with more parts being added all the time.

Why Replace?
Coil springs are integral to the overall handling of the vehicle, constantly working to absorb shocks and keeping the wheels in contact with the road to help deal with uneven surfaces. The imbalance caused by the failure of even one coil spring can lead to less responsive steering, reduced road contact, the friction of tyres and an increase in braking distance. This is the primary reason we recommend replacing coil springs in pairs.

Product Quality
NAPA coil springs are one of the most central and dynamic components of a vehicle’s suspension system; constantly helping to absorb shocks and maintain a safe ride, they do an excellent job of keeping the wheels in contact with the road and dealing with uneven road surfaces. The design and manufacture of coil springs is crucial to the comfort and safety of the occupants of a vehicle, as well as affecting the lifespan of the vehicle itself.

NAPA coil springs are rigorously tested as part of the manufacturing process where they undergo testing for durability including material testing to assess the strength of material used as well as the thickness of coating. They are tested for load loss and fatigue through 200,000 cycles of cyclic fatigue testing, and corrosion resistance testing to show no rust during a 480 hour salt spray test, as well as checks to packaging to ensure product quality meets that of the exacting NAPA standards.

The Technical Bit
The most widely-used type of suspension spring is the coil spring however, differing market requirements may dictate that a manufacturer specifies a number of spring designs for the same model; there may even be two different springs on the same axle.

Suspension systems are designed with the spring fully exposed to the road and this is a very harsh environment in which to operate. The spring is continually under attack from water, stones and salt during the winter months, and without adequate protection, the steel would begin to rust very quickly.

The lifespan of the spring heavily depends on the quality and mechanical properties of the material it is constructed from, as well as the manufacturing and surface treatment properties. NAPA produces steel springs which meet the exacting automotive industry standards and the coils go through the shot peening process to be strengthened before being painted and coated.

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