BC Racing HM Series Coilovers 2008-2014 Impreza STI Hatchback (GRB)

BC Racing HM Series Coilovers for the 2008-2014 Subaru WRX STI Hatchback (GRB) combine the inverted-damper durability of the RM Series with the independent compression and rebound tuning of the ER Series — BC's pick for track-day McPherson-strut builds. Every kit is extensively tested on the WRX STI Hatchback GRB chassis and refined until it balances ride quality with performance — the reason WRX STI Hatchback coilovers from BC Racing are the best-selling adjustable kits in their segment worldwide.

HM Series kits use an inverted mono-tube damper on McPherson-strut chassis (upright on double-wishbone) with external reservoirs feeding separate compression and rebound adjusters. The result: the tuning depth of the ER Series inside the heavy-load chassis architecture of the RM. Where BC Racing separates itself is tuning philosophy: every off-the-shelf spring rate and damper setup is chosen to stay comfortable on daily roads while still delivering real performance at the track. If you want something different, Swift Springs, custom rates, and custom valving are all options at checkout — BC will match the valving of the dampers to whatever springs you pick, something most brands don't offer outside their flagship race lineup.

Since 2004, BC Racing has grown into one of the most trusted names in aftermarket coilovers — not by racing to the bottom on price, but by pairing that price with real build quality, deep customization options, and a damper design any suspension shop can rebuild instead of replacing. These WRX STI Hatchback coilovers arrive tuned for the GRB chassis and ready to bolt in — no break-in period, no guessing at setup.

Features

• 30-level rebound adjustment (top of damper)
• 30-level compression adjustment (external reservoir)
• Inverted mono-tube damper on McPherson-strut vehicles; upright on double-wishbone
• Combines RM Series inverted-damper architecture with ER Series 2-way adjustability
• Ride height adjustable independent of spring preload
• Upper mount hardware varies by chassis — camber plates, pillowball, or reused OEM mounts. See the Specifications table for what's included on your kit.
• Swift Spring and custom spring rate upgrades available at checkout
• Custom damper valving paired with custom spring rates on request
• Fully rebuildable — replacement parts available from BC for the life of the shock
• 2-year manufacturer warranty against defects

Specifications

Vehicle Fitment