Hyperco Conventional Springs - OD 5.5"

Hyperco

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SKU: 18Z0300

Hyperco Conventional Springs - OD 5.5"

$98.00
In Stock

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Fitment Notes

All fitment information on our website is provided by the manufacturer. It is the customer's responsibility to thoroughly read the product description and confirm fitment before placing an order and proceeding with installation.

Unless specified otherwise, all suspension products are designed for 2WD vehicles only. Any notes or descriptions related to electronic damping systems (EDC, DDS, etc.) apply strictly to vehicle fitment. Aftermarket coilovers are not compatible with OEM electronic damping control systems unless explicitly stated.

*Product images may not represent the actual SKU.

Handling Time

All handling times are estimates and may change at any time.

  • In Stock: 1-3 business days
  • Out of Stock: 8-10 weeks
30-Day Returns

Not quite right? No problem — we offer hassle-free 30-day returns on eligible items. A few exclusions apply.

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Lifetime Manufacturer Warranty

Hypercoils are guaranteed for life to the original purchaser with proof of purchase from Hyperco or our authorized dealers/distributors. The warranty guarantees that the coils will remain within two percent of the original manufacturing tolerances for rate and free length when properly cared for & used in normal racing conditions.

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Product Details

Hyperco Conventional Race Springs — 5.5" OD — are the benchmark stacked-spring and big-body-shock choice for stock car, late model, sprint car, and dirt racing applications. Each spring is wound in the USA to race-series tolerance and delivers a more predictable, more repeatable rate curve than any generic conventional spring on the market.

Choose free length and rate to match your chassis setup. Every spring is covered by Hyperco’s lifetime breakage warranty. For dirt racers and stock car builders who need consistent rate across a long season, this is the spring Cup and late-model teams already trust.

About Hyperco

Hyperco has engineered precision suspension springs in the USA since 1970, supplying teams in Formula 1, IndyCar, NASCAR, Pirelli World Challenge, and top drift and time-attack programs. Every spring is wound from proprietary high-tensile steel and backed by a lifetime warranty against breakage.

Specifications
SKU Outside Diameter (in) Free Length (in) Rate (lbf/in) Deflection (in) Load (lb) Solid Height (in)
18Z0300 5.5 9.5 300 6.617 1985 2.883
18Z0350 5.5 9.5 350 6.504 2276 2.996
18Z0400 5.5 9.5 400 6.42 2567 3.08
18Z0450 5.5 9.5 450 6.311 2840 3.189
18Z0500 5.5 9.5 500 6.132 3066 3.368
18Z0550 5.5 9.5 550 6.085 3346 3.415
18Z0600 5.5 9.5 600 5.845 3507 3.655
18Z0650 5.5 9.5 650 5.384 3500 4.115
18Z0700 5.5 9.5 700 5 3500 4.5
18Z0750 5.5 9.5 750 5.409 4057 4.091
18Z0800 5.5 9.5 800 4.375 3500 5.125
18Z0850 5.5 9.5 850 4.118 3500 5.382
18Z0900 5.5 9.5 900 4.772 4250 4.778
18Z0950 5.5 9.5 950 4.737 4500 4.763
18Z1000 5.5 9.5 1000 4.5 4500 5
18Z1050 5.5 9.5 1050 4.286 4500 5.214
18Z1100 5.5 9.5 1100 4.091 4500 5.409
18Z1200 5.5 9.5 1200 2.917 3500 6.583
18Z1320 5.5 9.5 1320 3.409 4500 6.091
18Z1440 5.5 9.5 1440 2.7 3900 6.8
18Y1490 5.5 9.5 1490 4.172 6216 5.328
18SNP11-175 5.5 11 175 8.196 1434 2.804
18SNP11-200 5.5 11 200 7.704 1540 3.296
18SNP11-225 5.5 11 225 7.786 1751 3.214
18SNP11-250 5.5 11 250 8.204 2050 2.796
18SNP11-275 5.5 11 275 7.772 2137 3.228
18Z0800-11 5.5 11 800 4.375 3500 6.625
18Z0900-11 5.5 11 900 4.444 4000 6.556
18Z1000-11 5.5 11 1000 3.5 3500 7.5
18Z1100-11 5.5 11 1100 3.181 3500 7.818
18Z1200-11 5.5 11 1200 3.75 4500 7.25
18Z1300-11 5.5 11 1300 3.462 4500 7.538
18SNP12-175 5.5 12 175 8.903 1558 3.097
18SNP12-200 5.5 12 200 8.704 1740 3.296
18SNP12-225 5.5 12 225 8.786 1976 3.214
18SNP12-250 5.5 12 250 8.533 2133 3.467
18SNP12-275 5.5 12 275 8.333 2291 3.667
18SNP12-300 5.5 12 300 8.566 2569 3.434
18Z0800-12 5.5 12 800 5 4000 7
18Z0900-12 5.5 12 900 4.889 4500 7.111
18Z1000-12 5.5 12 1000 4.5 4500 7.5
18Z1100-12 5.5 12 1100 5 5500 7
18Z1200-12 5.5 12 1200 2.917 3500 9.083
18Z1300-12 5.5 12 1300 3 3900 8

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