BP-51 (Bypass 51mm diameter bore) shock absorbers: The new BP-51 range of high performance, bypass shock absorbers is the result of an exhaustive development process aimed at delivering the ultimate in both comfort and control.
In addition to the velocity sensitive damping used in most shock absorbers, where the faster the piston moves, the higher the level of damping is generated, BP-51 shock absorbers also generate damping dependent on the position of the piston within the shock absorber's body via their bypass design. In order to achieve this, significant investment has been made in state High-quality X5K grade steel coil, for use on coil over models, incorporates application-specific design;Large, Teflon-lined spherical bearings;6061 grade aluminum spring seat, top hat, spring preload/ride height adjuster;Durable Dash 6 high-temperature Teflon hose incorporates high-flow fittings for optimum oil flow;6061 grade aluminum remote oil canister allows for increased oil volume, resulting in lower oil temperatures;Sold individually;Image is representative, actual product may differ;California Residents: WARNING ARB Old Man Emu BP51 Coilover Shock - BP5190005R While most shock absorbers only generate damping based on fluid flowing through the piston, the BP-51 offers an alternative path from one chamber to the other, around the piston in the form of bypass passages.