{"product_id":"cobb-control-arm-subaru-wrx-wrx-sti-2015-2021-front-lower-cb-aly0016k","title":"COBB Control Arm Subaru WRX \/ WRX STi (2015-2021) Front Lower - Standard Alignment or Offset Caster","description":"\u003cp\u003e\u003cspan style=\"color: #ff2a00;\"\u003e\u003cb\u003eFitment Information\u003c\/b\u003e\u003c\/span\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSubaru WRX \/ WRX STi (2015, 2016, 2017, 2018, 2019, 2020, 2021)\u003c\/li\u003e\n\u003cli\u003eSubaru WRX STI Type RA (2018)\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eSubaru WRX STI S209 (2019)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cstrong\u003eSpecs \u0026amp; Features\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul class=\"no-b-margin\"\u003e\n\u003cli\u003e\n\u003cb\u003eUnsprung Weight Diet:\u003c\/b\u003e Constructed from high-strength \u003cb\u003eLightweight Alloy\u003c\/b\u003e that is significantly lighter than the heavy OEM steel arms, allowing the suspension to react faster to bumps and road imperfections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003ePrecision Steering:\u003c\/b\u003e Pre-installed \u003cb\u003e94a Durometer Bushings\u003c\/b\u003e replace the mushy factory rubber, eliminating unwanted deflection and keeping the tire contact patch flat during hard cornering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTwo Geometry Options:\u003c\/b\u003e Available in \u003cb\u003eStandard Alignment\u003c\/b\u003e (for a factory reset) or \u003cb\u003eOffset Caster\u003c\/b\u003e (to add positive caster for better stability).\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStreetable Performance:\u003c\/b\u003e Engineered to provide race-car stiffness without ruining the ride quality—minimal increase in NVH (Noise, Vibration, Harshness) means it’s still comfortable for the daily commute.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eStronger Than Steel:\u003c\/b\u003e The alloy construction isn't just lighter; it provides superior structural rigidity, handling the high G-forces of track days without flexing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"color: #ff0000;\"\u003e\u003cb\u003e\u003c\/b\u003e\u003cstrong\u003eProduct Description\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"8\"\u003eThe front lower control arm is the backbone of the Subaru front suspension. Unfortunately, the factory WRX arms are made of heavy stamped steel with soft rubber bushings that squirm under load. This leads to vague steering and a suspension that feels \"slow.\" The \u003cb\u003eCOBB Tuning Alloy Lower Control Arm Kit\u003c\/b\u003e solves both problems instantly. By switching to aluminum alloy, COBB reduces \"unsprung weight\"—the mass that the shocks and springs have to control. Less weight means the wheel can track the ground better, giving the driver more grip and confidence.\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003e\u003cb\u003eThe Bushing Factor\u003c\/b\u003e - Stock rubber bushings act like a sponge, absorbing energy that should be going into turning the car. COBB pre-installs \u003cb\u003e94a Durometer\u003c\/b\u003e bushings that are stiff enough to prevent deflection but forgiving enough to absorb road noise. This means when the driver turns the wheel, the car reacts immediately.\u003c\/p\u003e\n\u003cp data-path-to-node=\"10\"\u003e\u003cb\u003eStandard vs. Offset Caster: Which do you need?\u003c\/b\u003e COBB offers this upgrade in two flavors, and the difference is all in the geometry:\u003c\/p\u003e\n\u003cul data-path-to-node=\"11\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,0,0\"\u003e\u003cb\u003eStandard Alignment:\u003c\/b\u003e This is a direct geometry replacement. It retains the factory wheelbase and caster settings but adds the benefits of alloy construction and stiffer bushings. Perfect for the driver who likes the stock feel but wants more precision.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,1,0\"\u003e\u003cb\u003eOffset Caster:\u003c\/b\u003e This is for the handling perfectionist. The rear bushing assembly is offset (moved inboard), which pushes the mounting point of the arm outboard. This geometry trick sweeps the arm forward, relocating the knuckle and adding approximately \u003cb\u003e0.5° of positive caster\u003c\/b\u003e per side. Why does that matter? \u003cb\u003ePositive caster\u003c\/b\u003e improves straight-line stability at highway speeds and increases \"dynamic camber\" during turns, giving the front tires more bite when cornering hard.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhy does that matter? \u003cb\u003ePositive caster\u003c\/b\u003e improves straight-line stability at highway speeds and increases \"dynamic camber\" during turns, giving the front tires more bite when cornering hard.\u003c\/p\u003e\n\u003cp data-path-to-node=\"13\"\u003eThis is one of the most effective suspension upgrades available for the Subaru chassis. It’s not just a replacement part; it’s a transformation. By combining weight savings, increased rigidity, and optimized bushing stiffness, COBB allows the WRX to punch well above its weight class. Whether chasing lap times or just enjoying a favorite back road, these arms provide the feedback and control that the factory left on the table.\u003c\/p\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e\n\u003cul\u003e\u003c\/ul\u003e","brand":"COBB","offers":[{"title":"Standard Alignment","offer_id":41902701183056,"sku":"COBBCB-ALY0016K","price":1025.0,"currency_code":"USD","in_stock":true},{"title":"Offset Caster","offer_id":41902701215824,"sku":"COBBCB-ALY0017K","price":1025.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0058\/0252\/4785\/files\/CB-ALY0016K_main.jpg?v=1765949345","url":"https:\/\/shop.redline360.com\/products\/cobb-control-arm-subaru-wrx-wrx-sti-2015-2021-front-lower-cb-aly0016k","provider":"Redline360","version":"1.0","type":"link"}