Megan Racing Rear Lower Control Arms For The 12+ Scion FRS Part Numbers: MRS-SC-0621-V3 Adjustable camber arms allow an increase of the vehicle's adjustability where the manufacturer typically does not. Adjusting the vehicle's camber angle not only allows for the wheel alignment to achieve OEM specifications on a lowe Constructed of high-strength steel alloys that offer durability, strength and yet remain light-weight, these control arms have been track tested for months in road race, autocross and drift events to assure quality and performance. These Toe-Control arms allow for fine-tuned adjustments to the rear toe in/out setting of your FRS. Front lower control arms: Determine your roll center, track width, and camber curve. The actual arc these move in is the camber curve (as dictated by the tension rod). Front lower control arms included tension rods. Comes with tension rods for complete adjust-ability for your FR-S/BRZ. Applications and feature. Scion FRS 2013+, Subaru BRZ 2013+ Megan Racing Performance Lowering Springs are constructed of SAE 9254 Cold Wounded Steel, one of the strongest materials available. The high tensile strength and phosphate powder coating delivers outstanding spring rates that are extremely durable and resist premature “sagging”. Megan Racing Rear Lower Control Arms- 13+ Subaru BRZ & Scion FR-S. MRS-SC-0621. The alignment of a car is extremely important when modifying suspension. The alignment can affect every aspect of your driving experience from driving in a straight line, understeer, oversteer, stability, acceleration, braking, and tire wear along with many other aspects.