Swift Springs Standard Coilover Springs - ID: 3" / Length: 12"

Swift Springs

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SKU: 120-300-100

Swift Springs Standard Coilover Springs - ID: 3" / Length: 12"

Sale price$128.35Regular price $151.00
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. If the item is out of stock, we’ll promptly inform you of the estimated wait time and suggest similar in-stock alternatives if you prefer to change the order.

  • In stock: 1 business day
  • Out of stock: TBD

30-Day Returns

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

More Information

1-Year Manufacturer Warranty

Swift Springs offers a limited 1-year warranty on their metric coilover springs against defects in materials and workmanship. This warranty applies to springs that are properly installed and used under normal conditions. Swift Springs will repair or replace defective springs at their discretion.

Product Details

Swift Springs Standard Coilover Springs in 3" ID and 12" length are precision-engineered race springs built to outperform conventional suspension springs in every measurable category. Designed for coilover dampers using standard SAE sizing, these 3" ID Swift springs are manufactured in Japan from proprietary H5S.TW high-tensile alloy steel. With fewer coils and reduced unsprung mass, Swift springs deliver increased traction, smoother weight transfer, lower tire temperatures, and the predictable feel that oval track, road course, drag, and off-road racers demand.

With over 90 years of spring manufacturing expertise, Swift Springs has engineered their standard coilover springs specifically for the American racing market. Unlike conventional springs where switching brands only changes ride stiffness, Swift Springs coilover springs deliver a noticeable increase in traction, smoother weight transfer, lower tire temperatures, and a more predictable feel that racers can tune around. Most Swift springs 10" and longer feature a barrel design that eliminates spring deflection and bowing — preventing spring rate inconsistency and rubbing against the shock body that can damage adjusting perch threads. All Swift Springs are manufactured using H5S.TW alloy, far superior to standard silicone chrome steel.

Swift Standard Coilover Spring Advantages

  • H5S.TW alloy steel outperforms standard silicone chrome in fatigue resistance and rate consistency
  • Fewer coils reduce unsprung weight and increase available shock stroke
  • Faster transient response tracks road surface changes for improved mechanical grip
  • Precision-engineered for oval track, road course, drag, and off-road racing
  • Consistent spring rates throughout the life of the spring
  • Made in Japan with over 90 years of spring manufacturing expertise

Note: Swift Standard Coilover Springs are sold individually. Select your desired spring rate from the options above.

PART # SPRING RATE USABLE STROKE MAX STROKE MAX LOAD
lbs/inch inch inch lbs
120-300-100 100 8.8 8.8 878
120-300-125 125 8.7 8.7 1,088
120-300-135 135 8.7 8.7 1,169
120-300-150 150 8.5 8.5 1,281
120-300-165 165 8.5 8.5 1,397
120-300-185 185 7.6 8.3 1,530
120-300-200 200 7.5 8.6 1,724
120-300-225 225 7.3 8.5 1,905
120-300-250 250 7.2 8.3 2,077
120-300-275 275 7.2 8.1 2,230
120-300-300 300 7.2 7.9 2,362
120-300-350 350 6.8 7.8 2,728
120-300-400 400 6.7 7.5 3,008
120-300-450 450 6.7 7.2 3,224
120-300-475 475 6.7 7.0 3,329
120-300-500 500 6.5 7.0 3,484
120-300-550 550 6.1 6.9 3,811
120-300-600 600 5.9 6.9 4,134
120-300-650 650 5.8 6.9 4,453
120-300-700 700 5.6 6.9 4,850
120-300-750 750 5.6 6.6 4,961

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