BC Racing's newest and most advanced model yet is the ER series coilover. It features large external reservoirs front and rear, separate rebound and compression adjustment and a twin piston design. The external reservoirs hold much more oil than the conventional coilover, allowing the coilover to operate for a much longer period of time before overheating. The external reservoirs also house the secondary piston, which allows for the fine tuning of compression. This is the perfect coilover system for the person who wants to fine tune their setup using the separate, 30-way, rebound and compression tuning dials.

●  External Reservoir Mono-tube shock design

●  30 levels of damping force adjustment, adjusts both compression and rebound separately

●  Twin piston design

●  Separate full length height adjustable

●  One year warranty

●  Rebuildable

Technical

● Coilovers use 46mm pistons and 53mm shock housings, the enlarged shock cartridges with specially designed pistons and rods provide a wide range of damping force.

● Valves are constructed of special spring steel, which outperforms stainless steels and produces longer valve life. Valve stacks use a patented deflective system to provide more precise control.

● Patented concave lower locking ring, to prevent unseating.

● Springs are made of SAE9254 high strength, durable steel. Compression tested at over 500,000 tires with less than 5% deformation.

● T6061 Aluminum utilized in spring locks and seats for high strength and lightweight.

● Iron lower brackets on MacPherson struts to ensure rigidity.

● Piston rods are constructed of highly polished steel to lengthen oil seal life and prevent leaking.

● High pressure inner rod guide seals ensure a perfect fit for consistent fade resistant damping and long shock life.

● 2 step coating process utilizing nickel and chromium plating to prevent corrosion.

● Newly developed lubricant oil in shock cartridges minimizes aeration and cavitation.

● An additional bearing beneath each pillowball mount provides the smoothest action and prolongs the lifetime of the pillowball itself.

Optional Strut Top Bushings: Add Whiteline Plus Strut Top Bushings Kit above and receive FREE SHIPPING.

Whiteline Plus Polyurethane Front Strut Mount Bushing Kit (Includes Bearings)

Have collapsed strut mount bushings or looking for a better ride quality? 

WHITELINE PLUS is a range of progressive polyurethane suspension bushings and components. By 'progressive' we are referring to the polyurethane's ability to
provide the quality ride of rubber at lower speeds and at higher speeds to become firmer, when under cornering pressure, for CHASSIS CONTROL and improved handling of your GTO.

Note: GM recommends replacing your stock strut bushings if they are removed.