Fitment Information Subaru WRX Base (2015, 2016, 2017, 2018, 2019, 2020, 2021) Subaru WRX Limited (2015, 2016, 2017, 2018, 2019, 2020, 2021) Subaru WRX Premium (2015, 2016, 2017, 2018, 2019, 2020, 2021) Subaru WRX STI Base (2015, 2016, 2017, 2018, 2019, 2020, 2021) Subaru WRX STI Launch Edition (2015) Subaru WRX STI Limited (2015, 2016, 2017, 2018, 2019, 2020, 2021) Subaru WRX STI S209 (2020, 2021) Subaru WRX STI Series.HyperBlue (2016) Subaru WRX STI Type RA (2018) Specs & Features Difference between F-Spec and FR-Spec: More aggressive shock valve Fluid viscosity 5W for F-Spec 20W for FR-Spec Shim stack Stiffer spring rates Pillowball aluminum front top-hats 32-click adjustable monotube shock with internal piston and damping stack tuned for aggressive driving. High Temperature/ higher stability shock fluid to better suit circuit driving. Adjustable Aluminum upper pillow ball mounts to reduce suspension deflection under aggressive driving conditions while allowing for fine alignment adjustments. FR-Spec: Adjustable: Yes Camber Adjustable: Front Only Caster Adjustable: No Dampening Adjust Type: 32-Click Damper Type: Monotube Drop Height Front: 0-2.9in Drop Height Front Metric: 0-73mm Drop Height Rear: 0.4-2.3in Drop Height Rear Metric: 10-57mm Height Adjustable: Yes Independent Height Adjustable: Yes Spring Rate Front: 672lbs/in Spring Rate Front Metric: 12Kg/mm Spring Rate Rear: 560lbs/in Spring Rate Rear Metric: 10Kg/mm Top Hats Included: Yes Designed specifically for performance driving, the FR-Spec coilovers feature an increased spring rate and increased damping coefficient in the shocks over the F-Spec to provide ultimate handling and vehicle control under aggressive driving conditions. F-Spec: Adjustable: Yes Camber Adjustable: No Caster Adjustable: No Dampening Adjust Type: 32-Click Damper Type: Monotube Drop Height Front: 0.3-3.0in Drop Height Front Metric: 6-76mm Drop Height Rear: 0.4-2.3in Drop Height Rear Metric: 10-57mm Height Adjustable: Yes Independent Height Adjustable: Yes Spring Rate Front: 448lbs/in Spring Rate Front Metric: 8Kg/mm Spring Rate Rear: 392lbs/in Spring Rate Rear Metric: 7Kg/mm Top Hats Included: Yes Increased spring rates and shock valving over stock suspension with emphasis on street performance while not jeopardizing ride quality and comfort 32-click adjustable monotube shocks allow for stock-like ride quality on the soft setting while providing enough adjustment to stiffen up the ride for the weekend track days or canyon drives The adjustment allows customers to fine-tune ride quality from soft too stiff in order to meet their road surface and driving environmental needs Rubber isolated top-hats feature a high durometer rubber mount to reduce deflection while isolating unwanted minor vibrations and road imperfections Includes height adjustment tools Includes damping adjustment tools+ FL-Spec V2: Adjustable: Yes Camber Adjustable: Front Only Dampening Adjust Type: 32-click Damper Type: Monotube Height Adjustable: Yes Independent Height Adjustable: Yes Spring Rate Front Metric: 9Kg/mm Spring Rate Rear Metric: 8.5Kg/mm Top Hats Included: Yes Up to 4″ of lowering adjustment for a more aggressive or stance setup. Increased spring rates and shock valving over stock suspension with emphasis on street performance while not jeopardizing ride quality and comfort 32-click adjustable monotube shocks allow for stock-like ride quality on the soft setting while providing enough adjustment to stiffen up the ride for the weekend track days or canyon drives The adjustment allows customers to fine-tune ride quality from soft to stiff in order to meet their road surface and driving environmental needs Pillow ball, camber-adjustable, aluminum front top hats Includes height adjustment tools Includes damping adjustment tools Product Description F-Spec: These are ideal for those of you looking to achieve that aggressive lowered look while improving the handling and steering response of your vehicle. These have been engineered using the right spring rates so that you can have an efficient suspension package without compromising the overall ride quality. FR-Spec These coilovers have been engineered with aggressive spring rates along with increased damping coefficient in the shocks to deliver the feedback and support needed under high-performance driving conditions. FL-Spec These are ideal for those of you looking to achieve up to 4″ of lowering adjustment while improving the handling and steering response of your vehicle. These have been engineered using the right spring rates so that you can have a low and efficient suspension package without compromising the overall ride quality. Japanese steel tube construction using SAE1010 STKM13c Monotube shock design with high-performance mono-tube shock construction allowing for better rider control, fluid life, and thermal fluid stability Synthetic high-performance oil Independent ride-height adjustability separately from spring pre-load allowing the customer to set the ride height without having to worry about shock travel Top hats included allowing this suspension system to be a direct replacement for your factory suspension setup Forged 6061 anodized adjustable collars and spring seats for easy adjustment and prolonged cycle life Robotic welded and electroplated lower shock mounts for consistent fit and finish Dust boots and bump stops for shock protection and longevity Individually sold components allowing for replacement or upgrade of components as desired or needed Plastic lower spring seat isolator to aid ride height adjustment and reduce unwanted audible noise V2 FL-SPEC STREET/TRACK HIGHLIGHTS: Spring rates and shock valving between F-Spec and FR-Spec for mixed duty on street and light track use Combines a rubber isolated pillow-ball bearing housing with a camber plate for a balance of comfort and adjustability The rubber isolator is one of the biggest contributors to a comfortable ride, absorbing a significant amount of vibration from the road and chassis Shorter shock body design and springs to increase the available ride-height adjustment range NOTABLE V1 TO V2 IMPROVEMENTS: All new components from top to bottom Revised spring rates - small adjustments for a perfect application More dynamic damping adjustment range - 30 clicks Offset camber plate to enable a more negative camber adjustment after lowering