Wheel alignment is absolutely crucial when modifying your car. Alignment can effect every aspect of your driving experience, from straight line stability, under-steer, over-steer, acceleration, braking and tire wear. Although stock components allow slight alignments from the stock suspension settings, they often are not able to properly align the car after the suspension has been modified. From the factory, most cars are set to have under-steer and for optimum tire wear at stock height; under-steer is often undesired from a performance standpoint but is always dependent on driver style, therefore the adjust-ability of the alignment of a vehicle is critical when tuning for speed. The clock does not lie and having the vehicle alignment can make seconds of a difference. Megan Racing Inc. has developed reinforced and adjustable control arms to accommodate the needs of the aggressive and performance oriented tuner. Being constructed of a Lightweight Steel-Alloy which is able to withstand the stresses of extreme competition, these arms are powder-coated with a 3-Stage process to ensure durability and protection against the elements. These rear upper Camber-Arms are adjustable to fine tune your cars handling when lowering a car, these will eliminate premature tire wear caused by the rear wheels riding upon the inside tread only. Due to the design of the rear double-wishbone suspension, these upper camber arm/upper control arm features an adjustable ball joint with hardened rubber for the inner pivot points to minimize suspension deflection. SPECIFICATIONS & FEATURES: Application: 2000-2009 Honda S2000 - Constructed of Steel Alloy for Lightweight yet Durable performance. - Spherical bushings for a more direct feel and driving experience. - Easy to access turnbuckle-style adjustment. - Can be adjusted without removing from the vehicle. - Eliminates Premature Tire Wear while improving handling and stability. NOTES: In 2004, Honda changed and updated the rear upper control arms and suspension; 00-03 S2000s (AP1) can use product MRS-HA-1521; 2004-09 S2000s (AP2) can also use MRS-HA-1521 including the spacers that are included in this kit. This way, the rear upper control arm can now fit both AP1 and AP2 chassis. While no special instruction is necessary, we are including an instruction sheet regardless. A very easy installation procedure, that involves including the now-included spacer on the bushing side.