IAG Spec Street Series Coilovers by Fortune Auto for Subaru WRX/STi 2015-21 – IAG-SUS-1004

Transform Your Subaru WRX/STI — Performance That Doesn’t Compromise Comfort

For owners of the 2015–2021 Subaru WRX or WRX STI who want both serious handling upgrades and daily-ride comfort, the IAG Spec Street Series Coilovers (Part Number IAG-SUS-1004) are engineered precisely for your platform. This kit delivers adjustable ride height, tuned valve performance, and full-system build — no generic guesswork. IAG Performance

  • IAG SPEC STREET SERIES COILOVERS BY FORTUNE AUTO – IAG Performance and Fortune Auto have joined forces to bring you the IAG Spec Street Series Coilovers By Fortune Auto, designed for the 2015-2021 WRX and STI vehicle models. These single adjustable coilovers strike the perfect balance between everyday driveability and occasional track use, enhancing the handling of your vehicle without compromising comfort. This complete kit, featuring both front and rear coilovers, delivers improved handling and performance.
  • THE IAG SPEC DIFFERENCE: WHERE INNOVATION MEETS UNBEATABLE PERFORMANCE – At IAG Performance, we’re committed to pushing the boundaries of automotive performance. Through constant research, development, and testing on countless track days, we’ve developed a reputation for innovation. When we find a part we like from a brand we trust, like the Fortune Auto 500 Coilovers, we take it a step further to make it even better. The IAG Spec Street Series Coilovers are the result of our commitment to perfection. We’ve enhanced key features of the Fortune Auto 500 Coilovers, improving performance, road feel and overall handling to deliver a coilover system that’s optimized for both street and track use.
  • THE IAG SPEC DIFFERENCE: WHERE INNOVATION MEETS UNBEATABLE PERFORMANCE – At IAG Performance, we’re committed to pushing the boundaries of automotive performance. Through constant research, development, and testing on countless track days, we’ve developed a reputation for innovation. When we find a part we like from a brand we trust, like the Fortune Auto 500 Coilovers, we take it a step further to make it even better. The IAG Spec Street Series Coilovers are the result of our commitment to perfection. We’ve enhanced key features of the Fortune Auto 500 Coilovers, improving performance, road feel and overall handling to deliver a coilover system that’s optimized for both street and track use.
  • COILOVER SPECS – The front suspension in the IAG Spec Street Series Coilovers By Fortune Auto are engineered to the following specifications Front: 127mm front shock stroke, custom shock valving, 270mm shock body, 8 inch spring length, 7kg/mm spring rate. The rear suspension coilovers meet the following specifications: 100mm rear shock stroke, custom shock valving, 200mm shock body, 7 inch spring length, 8kg/mm spring rate. Our Street Series Coilovers are equipped with 1” extended top hats.
  • CUSTOM TUNED – NOT OFF THE SHELF – With an extra 10mm of front shock stroke compared to Fortune Auto’s coilovers, we’ve optimized suspension travel, resulting in a more forgiving and smooth ride. The softer 7kg/mm front spring allows for optimal weight transfer to the front during braking and to the rear during acceleration. Our 8-inch front spring increases travel, reducing the risk of bottoming out, while the extra 10mm stroke restores the suspension travel that’s often reduced when lowering your coilovers. When you’re finished attacking the tarmac, the 24 clicks of rebound and compression adjustment allow you to convert your suspension from track-focused to comfort without compromise.
  • EXTENDED REAR TOP HAT – The IAG Spec Street Series Coilovers By Fortune Auto are equipped with a 1 inch extended top hat, which allows the shock absorbers to travel within their optimal range, even if the vehicle has been lowered. This adjustable coilover kit makes it easy to drop your car to gain the benefits of improved handling, aerodynamics, improved traction and road feel. Incorporating an extended top hat allows the full range of shock stroke, maintains the correct preload, all while avoiding damage to your coilovers.
  • LIGHTWEIGHT AND DURABLE CONSTRUCTION – The IAG Spec Street Series Coilovers By Fortune Auto incorporate the use of lightweight and durable T6061 aluminum in the camber plates and spring perches to maximize weight savings without compromising the strength or integrity of the suspension. Additionally, the coilover springs are constructed from an advanced premium alloy of chrome silicone, providing both elasticity and strength, ideal for high-performance applications.
  • FLOW DIGRESSIVE TECHNOLOGY BY FORTUNE AUTO – The IAG Spec Street Series Coilovers feature Fortune Auto’s Flow Digressive piston technology, which allows for stiff low-speed compression and rebound movement. To compensate for fast stroke speeds like high speed bumps or rough roads, the coilovers automatically adapt to become supple, providing superior mechanical grip and control, even over irregular surfaces. This technology delivers the best of both worlds, offering a versatile shock absorber that excels in everyday driving, as well as occasional track use.
  • ABOUT FORTUNE AUTO – It’s been a privilege to team up with Fortune Auto to create the IAG Spec Street Series Coilovers. Known for their cutting-edge suspension solutions and race-winning innovations, Fortune Auto’s relentless pursuit of performance has resulted in systems that offer exceptional handling, comfort, and durability at an affordable price. Like IAG Performance, Fortune Auto is a U.S.-based, enthusiast-driven brand, making this collaboration the perfect fit.
  • FITMENT – Fits Subaru WRX / STi 2015-2021

Engineered Specifically for the 2015-2021 WRX / WRX STI Platform

These coilovers are designed only for the 2015 through 2021 WRX and WRX STI models — so you’re getting fitment and tuning tailored for that chassis. 
Key features:

  • Ride height adjustability with extended shock stroke to retain travel when lowered.

  • Custom tuned monotube dampers using “Flow Digressive” piston technology for better control over both smooth roads and aggressive driving.

  • Tuned spring rates: approximately 7 kg/mm in front and 8 kg/mm in rear for this application, with proper spring lengths (8″ front, 7″ rear) to maintain travel and control.

  • Upgraded hardware: anodized aluminum top mounts and perch assemblies, extended top hats for maintaining preload and stroke when lowered.

$1,999.99

Buy now

SKU: B0DMXDWZ9C

What’s in the box

  • 2x Front Coilovers
  • 2x Rear Coilovers
  • 1x Hardware Installation Kit

From the brand

Benefits You’ll Feel — Sharper Handling, Clean Stance, Real-World Usability

  • A lowered center of gravity improves cornering stability, braking feel, and reduces body roll.

  • Clean stance with reduced wheel gap that complements the WRX/STI styling — look as good as you drive.

  • Adjustability means you can dial the suspension for daily commuting or firm it up for spirited back-road runs without regret.

  • Built specifically for your chassis means fewer compromises and better performance than generic kits.

 


Product description

IAG Spec Street Series Coilovers by Fortune Auto

IAG Performance Spec Street Series Coilovers Fortune Auto Suspension Lowering Springs Shock Struts

Fitment Information

This kit fits:

  • 2015–2021 Subaru WRX

  • 2015–2021 Subaru WRX STI
    (Designed for these models only – confirm you are within this range before purchasing.) FelixPerformance+1
    Installation is designed to be direct-bolt; but post-installation alignment (camber, toe, ride height) is strongly recommended to extract full benefit and avoid uneven tire wear.

 

The IAG Spec Difference: Where innovation meets unbeatable performance

Through constant research, development, and testing on countless track days, we’ve developed a reputation for innovation. When we find a part we like from a brand we trust, like the Fortune Auto coilovers, we take it a step further to make it even better. The IAG Spec Coilovers are the result of our commitment to perfection. We’ve enhanced key features of the coilovers, improving performance, road feel & overall handling to deliver a coilover system that’s optimized for both street & track use.

Subaru WRX STI 2015 2016 2017 2018 2019 2020 2021 15 16 17 18 19 20 21
Fortune Auto 500 Coilovers Subaru WRX STi

2015-21 WRX/STI Coilover Specs

Front Specs: 127mm front shock stroke, custom shock valving, 270mm shock body, 8 inch spring length, 7kg/mm spring rate.

Rear Specs: 100mm rear shock stroke, custom shock valving, 200mm shock body, 7 inch spring length, 8kg/mm spring rate. Our Street Series Coilovers are equipped with 1” extended top hats.

Custom tuned – Not off the shelf

The enhancements focus on refining suspension travel and improving everyday driving comfort, while still delivering track-worthy results. With an extra 10mm of front shock stroke compared to Fortune Auto’s coilovers, we’ve significantly optimized suspension travel, resulting in a more forgiving & smooth ride. The softer 7kg/mm front spring allows for optimal weight transfer to the front during braking and to the rear during acceleration. Our 8-inch front spring reduces the risk of bottoming out.

IAG-SUS-1006 2002 2003 2004 2005 2006 2007 WRX 02 03 04 05 06 07

Why Choose This Kit for Your WRX/STI?

  • Platform-specific tuning: optimized for 2015-21 WRX/STI so you get purposeful performance.

  • Adjustable ride height and damping provide versatility — from street drive to weekend fun.

  • High-end build quality from a collaboration between IAG Performance and Fortune Auto — both well-known in Subaru tuning.

  • Improved ride quality, better control, and aggressive look — without sacrificing daily usability.

 

Suspension Coilovers Lowering Springs Kit Accessories Aftermarket Parts

Extended rear top hat

The IAG Spec Coilovers By Fortune Auto are equipped with a 1 inch extended top hat, which allows the shock absorbers to travel within their optimal range, even if the vehicle has been lowered. This adjustable coilover kit makes it easy to drop your car to gain the benefits of improved handling, aerodynamics, improved traction and road feel. Incorporating an extended top hat allows the full range of shock stroke, maintains the correct preload, all while avoiding damage to your coilovers.

Lightweight and durable construction

The IAG Spec Street Series Coilovers By Fortune Auto incorporate the use of lightweight and durable T6061 aluminum in the camber plates and spring perches to maximize weight savings without compromising the strength or integrity of the suspension. Additionally, the coilover springs are constructed from an advanced premium alloy of chrome silicone, providing both elasticity and strength, ideal for high-performance applications.

IAG Performance Fortune Auto Suspension Red Black Coilovers Racing
If your 2015-2021 Subaru WRX or WRX STI is ready for its suspension upgrade, the IAG Spec Street Series Coilovers (IAG-SUS-1004) deliver everything you’re after: sharper handling, adjustability, and a performance feel you’ll appreciate every time you drive. This isn’t just a drop kit—this is a carefully engineered suspension system built for your car.
Ready? Install it. Align it. Drive it with confidence.

Specification: IAG Spec Street Series Coilovers by Fortune Auto for Subaru WRX/STi 2015-21 – IAG-SUS-1004

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Dimensions
Weight 24.040376 kg
Dimensions 66.04 × 43.18 × 20.32 cm

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