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Backpressure
4 height sensors with wiring and mounting hardware
even under the most experienced right foot
Our airboxes also feature enlarged fresh air ducts to ensure cool air for your turbos
ACT Subaru 04-20 WRX STI Mod Twin HD Street Kit Sprung Mono-Drive Hub Torque Capacity 700ft/lbs - T1S-S05 Oil Filter Blocks BackpressureT1S S05 Mod Twin 225 HD Sprung Street Kit is designed for high powered AWD street cars. It unites uncompromised pedal feel, durability, engagement quality with very high torque capacity by combining twice the organic friction surfaces with an ultra durable spring center Mono Drive hub in a completely modular design. Each diaphragm spring endures an exclusive four stage heat treating process providing a consistent light pedal feel. Steel backed
