The HM Series pairs an inverted monotube damper with the independent compression and rebound adjustment from the ER Series. You get the strength and heat handling of the inverted design with two-way damping control, so it works well for cars that see regular track time.
It’s the middle ground between the RM and ER kits. GSM Performance stocks BC Racing across the range, so call 0115 9893488 if you want help choosing.
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Not sure what fits, which approval you need, or what to choose next? Ask Garreth and Cameron. You’ll get a practical answer from people who handle the kit every day.