Swift Springs Standard Coilover Spring (Barrel Type) - ID: 3.75" / Length: 20"

Swift Springs

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SKU: 120-375-300B

Swift Springs Standard Coilover Spring (Barrel Type) - ID: 3.75" / Length: 12"

Sale price$136.85Regular price $161.00
4.6
Rated 4.6 out of 5 stars
8 Reviews
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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 (Barrel Type) in 3.75" ID and 12" length are precision-engineered barrel-design race springs for large-bore coilover dampers. These 3.75" ID Swift barrel coilover springs are manufactured in Japan from proprietary H5S.TW high-tensile alloy steel, combining the anti-deflection barrel design with the strength needed for heavy vehicle and high-load applications.

Swift Springs has over 90 years of precision spring manufacturing experience. The barrel design eliminates spring bowing and rate inconsistency, protecting the shock body and ensuring predictable handling. All Swift coilover springs use H5S.TW alloy for superior fatigue resistance and consistent spring rates.

Why Racers Choose Swift Springs Coilover Springs

  • Proprietary H5S.TW alloy delivers superior fatigue resistance and consistent spring rates
  • Barrel design eliminates spring deflection and bowing
  • Fewer coils reduce unsprung weight and maximize usable shock stroke
  • Quicker transient response improves traction and road surface tracking
  • Precision-ground flat ends ensure even seating on the perch
  • Trusted by professional racing teams worldwide

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

Specifications
PART # SPRING RATE USABLE STROKE MAX STROKE MAX LOAD
lbs/inch inch inch lbs
120-375-300B 300 7.6 8.5 2,539

Customer Reviews

See what customers think of this product.

4.6
Rated 4.6 out of 5 stars
Based on 8 reviews
100%would recommend these products
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8 reviews
  • DS
    Dan S.
    Verified Buyer
    Reviewing
    Swift Springs Metric Coilover Springs - ID: 60mm / Length: 8"
    Rated 5 out of 5 stars
    Great springs

    Swift makes great springs. I haven't put these in yet, running different springs now.

    It's a matter of trial and error to get the car balanced.

    The picture is what is in the car now. The helpers are too soft so I bought assist springs as well.

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  • G
    Gabby
    Flag of United States
    Verified Buyer
    Reviewing
    Swift Springs Metric Coilover Springs - ID: 65mm / Length: 4"
    Rated 5 out of 5 stars
    Always a customer

    This is my second set of springs from you guys. My car rides exactly how I want it to and lets me get the ride bight I’ve been trying to achieve. I’ll be a customer for as long as I’m modifying cars!

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    S Profile picture for Springrates
    Springrates
    3 years ago

    Thanks so much, Gabby! We're thrilled you love them. You can't go wrong with Swift Springs!

  • AS
    Andrew S.
    Flag of United States
    Verified Buyer
    Reviewing
    Swift Springs Coilover Helper Springs (Flat Wire) - ID: 70mm (2.75")
    Rated 4 out of 5 stars
    Good but just one thing

    Very happy with my purchase of the BC racing BR coilovers. They compliment my car and driving style.

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  • IM
    Ian M.
    Flag of United States
    Verified Buyer
    Reviewing
    Swift Springs Metric Coilover Springs - ID: 70mm / Length: 6"
    Rated 5 out of 5 stars
    Swift with springs

    Excellent customer service and product. Highly recommend purchasing from this company. Just had my first autocross with the new springs and they performed excellently. Quite happy.

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    S Profile picture for Springrates
    Springrates
    3 years ago

    Thanks so much, Ian! Send us some photos of your racing too!

  • T
    Timothy
    Flag of United States
    Verified Buyer
    Reviewing
    Swift Springs Metric Coilover Springs - ID: 70mm / Length: 6"
    Rated 5 out of 5 stars
    As what I expected!!

    Great springs for the price! Made the car feel much more in tuned with the road!

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Questions & Answers

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