IAG SPEC STREET SERIES COILOVERS BY FORTUNE AUTO – IAG Performance and Fortune Auto have partnered up to bring you the IAG Spec Street Series Coilovers By Fortune Auto, designed for the 2008-2014 STI vehicle models. These single adjustable coilovers are the perfect balance between everyday driveability and occasional track use, enhancing your Subaru’s handling 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.
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 come 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 for the full range of shock stroke, as well as maintains the correct preload, all while avoiding potential damage to your coilovers.
LIGHTWEIGHT AND DURABLE CONSTRUCTION – The IAG Spec Street Series Coilovers By Fortune Auto incorporate the use of lightweight, yet 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 manufactured 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 uneven surfaces. This technology delivers the best of both worlds, offering a versatile shock absorber that excels in both everyday driving and 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 and quality 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 a perfect fit.
FITMENT – Fits Subaru STi 2008-2014
Enhanced Handling You Can Feel
When installed, the difference is immediate. Your STi feels sharper, flatter, and more predictable. The improved damping curve and spring rates drastically reduce body roll, allowing faster cornering speeds and better tire grip.
Paired with a proper alignment, your STi will:
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Corner flatter and with more precision.
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Respond quicker to steering input.
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Feel more stable during acceleration and braking.
In short, you’ll drive faster, smoother, and with more confidence.
Designed by Subaru Experts
This isn’t just another universal coilover kit. The Fortune Auto x IAG collaboration is the result of years of motorsport and street tuning experience. IAG Performance specializes in Subaru platforms, ensuring each damper and spring combination perfectly complements the STi’s weight, chassis balance, and drivetrain behavior.
The result is a coilover system that feels OEM-refined, yet enthusiast-tuned—precisely what STi owners demand.
Perfect for Street & Track Enthusiasts
If you want to daily your STi but also push it hard at the track or local autocross, this setup delivers the versatility you need. Unlike harsh track-only suspension kits, the IAG-SUS-1003 coilovers are designed to blend compliance with control, giving you the best of both worlds.
Whether you’re lowering your car for looks or improving performance for competition, these coilovers ensure your STi performs flawlessly in every environment.
Conclusion
The 2008–2014 Subaru STi Fortune Auto IAG Spec Street Series Coilovers (IAG-SUS-1003) aren’t just a suspension upgrade—they’re a total driving experience upgrade. With precision damping, ride height adjustability, durable construction, and Subaru-specific tuning, they deliver everything a performance enthusiast could ask for.
If you want to unlock the full potential of your GR or GV STi, improve comfort, and dominate every corner with confidence, the IAG Fortune Auto Spec Street Series Coilovers are the ultimate solution.
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