The H&R 51855-2 is a Sport Spring lowering set for the 2008–2012 Honda Accord four-door with the four-cylinder engine. It replaces the factory coil springs to lower ride height and reduce the gap between tire and fender, and the manufacturer publishes installation and safety instructions for its springs on its customer service page. Buyers looking for a sport-tuned stance without coilovers will find this a practical first step, provided the factory dampers are in good shape.
Owners on user forums say these springs are a reasonable middle ground over stock, though one reports the ride turns bouncy on rough, uneven pavement. Those same owners warn that lowering springs on factory struts can wear the struts quickly, so many pair them with upgraded dampers such as Koni or KYB units. Searching for H&R Accord sport springs, 2008 Accord 4-cyl lowering springs, and 2012 Accord sedan lowering springs will surface this exact fitment, which matters because a lowering spring that does not match your trim and engine can cost you ride quality and alignment.
Owners on user forums report that lowering springs on factory struts tend to wear them out sooner, and they commonly recommend upgraded dampers at the same time as the springs.
Owners on user forums advise getting an alignment after the springs are installed, since the new height can change camber and affect tire wear.
This listing covers the four-cylinder 2008–2012 Accord. Details on trim and engine coverage vary across sources, so confirm your exact engine and trim with the manufacturer before ordering.
The manufacturer publishes installation and safety instructions for its springs, so review them before you start. Owners on user forums recommend a four-wheel alignment once the car is back on the ground. On the sedan, the rear strut tops are reached only after removing the rear shelf, so allow extra time if you replace struts at the same time as the springs.