{"product_id":"spl-adjustable-caster-trailing-arms-porsche-911-996-997-and-boxster-cayman-986-987","title":"SPL Adjustable Caster \/ Trailing Arms - Porsche 911 996\/997 \u0026 Boxster\/Cayman 986\/987","description":"\n\u003cp\u003eThe SPL Tension \/ Trailing Arms provide the necessary adjustability to the caster and anti-geometry to improve mechanical grip, provide greater stability under aggressive braking, improved acceleration, and additional steering feel. Larger PTFE-lined, F1-fit FK USA spherical bushings provide the benefits of the OEM spherical with longer life due to the increased surface area of the bearing. The kit allows for a deeper customization of the suspension geometry to better suit your driving preferences and adapt to changes in tracks, aero loading, tires, and more.\u003c\/p\u003e\n\u003c!-- Intro Description --\u003e\n\u003ch3\u003eTechnical\u003c\/h3\u003e\n\u003ch4\u003eCaster Adjustment\u003c\/h4\u003e\n\u003cp\u003eSet the Ideal Caster for Better Lateral Grip\u003c\/p\u003e\n\u003cp\u003eCaster angle is critical to a MacPherson strut front suspension because it increases the amount of camber that is gained as steering angle is increased. It also improves the centering torque on the steering wheel for straight line stability and additional tire feedback. The result is better grip mid-corner and an improvement to peak braking by slightly reducing the need for static camber.\u003cbr\u003eAdjustable caster also allows you to adjust the wheel location (side view) to prevent tire rub with the front bumper, or fender in some cases.\u003cbr\u003eIf mounted in the rear, there is no caster angle benefit due to the lack of significant steering angle, however the length of the trailing arm is important for setting the bumpsteer and other kinematic behaviors of the rear suspension.\u003c\/p\u003e\n\u003ch4\u003eTrack Width Adjustment\u003c\/h4\u003e\n\u003cp\u003eGet More from the Inner Tire\u003c\/p\u003e\n\u003cp\u003eExtending the front track width promotes a more neutral handling behavior and reduces the overall amount of weight that shifts off the inner tire and onto the heavily loaded outer. This is a big reason why Porsche has added nearly 5\" (124mm) to the front track of the 911 GT3 since the 996, and nearly 3\" (72mm) to the Boxster\/Cayman since the 986. The SPL front lower control arm, SPL tension \/ traction arm, and an adjustable camber plate allows you to properly maximize front track width and set your ideal camber angle.\u003c\/p\u003e\n\u003ch4\u003eAnti-Geometry Adjustment\u003c\/h4\u003e\n\u003cp\u003eFine Tune the Chassis Response Under Hard Braking or Acceleration\u003c\/p\u003e\n\u003ch5\u003eINSTALLED IN THE FRONT\u003c\/h5\u003e\n\u003cp\u003eIn the front, the provided spacers allow for fine tuning of the anti-dive geometry. The more anti-dive (expressed as a %) a car has less the front suspension will compress under braking. This geometry becomes more important as cars increase braking force with grippy tires and aero, especially on bumpy tracks and softer front spring rates. Changing anti-dive geometry can be helpful when setting up the front suspension to maintain acceptable front splitter heights or sufficient front suspension travel.\u003c\/p\u003e\n\u003ch5\u003eINSTALLED IN THE REAR\u003c\/h5\u003e\n\u003cp\u003eWhen mounted in the rear, the adjustment affects the anti-squat geometry, which is essentially the same concept as anti-dive. The more anti-squat (expressed as a %) a car has the less the rear suspension will squat under acceleration. This geometry's effect is more pronounced in lower gears and higher rates of acceleration. Additional anti-squat can prevent bumpsteer on corner exit and improve corner exit acceleration as well as peak tire grip available under hard acceleration. Certain road surfaces and setups may benefit from running slightly less anti-squat, so we've left it adjustable in small increments.\u003cbr\u003eFor big aero cars, adding anti-squat can also be a beneficial tool for keeping the rake angle of the chassis in the proper range on corner exit. The more the rear suspension compresses, the higher the front splitter rises, which can lead to a sudden reduction in front grip prematurely in the corner.\u003c\/p\u003e\n\u003ch5\u003eINSTALLED IN FRONT AND REAR\u003c\/h5\u003e\n\u003cp\u003eThis kit can be installed in the front or the rear of the 996 and 997, or it can be paired with RTR 986 or RTR 981 for the rear of the Boxster and Cayman (986\/987\/981). This allows for fine tuning of both the above anti-geometries which also migrates the sideview instant centers (SVIC) and resulting pitch axis of the car. This has an affect on lesser anti-geometries such as front anti-lift (AWD - front axle accel) and rear anti-lift (AWD\/RWD - braking) for those seeking a very specific chassis behavior on a setup. Note: Certain geoemetry changes may require modification of the spacer stack.\u003c\/p\u003e\n\u003c!-- Technical Benefits --\u003e\n\u003ch3\u003eBenefits (Front Install)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAdjustable Caster and Anti-Dive\u003c\/li\u003e\n\u003cli\u003eLightweight: 1.53 lbs (0.70 kg) per Side\u003c\/li\u003e\n\u003cli\u003eImproved Front Grip (with Steering Angle)\u003c\/li\u003e\n\u003cli\u003eImproved Bearing Life with Larger Spherical vs OEM\u003c\/li\u003e\n\u003cli\u003eImproved Braking Stability\u003c\/li\u003e\n\u003cli\u003eGreater Adaptability for Wheel\/Tire Clearance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBenefits (Rear Install)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAdjustable Anti-Squat and Rear Kinematics\u003c\/li\u003e\n\u003cli\u003eLightweight: 1.53 lbs (0.70 kg) per Side\u003c\/li\u003e\n\u003cli\u003eImproved Rear Acceleration Grip\u003c\/li\u003e\n\u003cli\u003eImproved Bearing Life with Larger Spherical vs OEM\u003c\/li\u003e\n\u003cli\u003eImproved Braking Stability\u003c\/li\u003e\n\u003cli\u003eGreater Adaptability for Wheel\/Tire Clearance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Benefits List --\u003e\n\u003ch3\u003eMaterials\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e6061-T6 Billet Aluminum Arms, 360° Clamps, and Clevis (Anodized Black)\u003c\/li\u003e\n\u003cli\u003e6061-T6 Billet, Hollow Aluminum Trailing Link (Anodized Black)\u003c\/li\u003e\n\u003cli\u003e4140 ChroMoly Clevis Stud\u003c\/li\u003e\n\u003cli\u003e304 Stainless Steel Adjustment Spacers\u003c\/li\u003e\n\u003cli\u003eZinc Plated Class 10.9 Metric Hardware\u003c\/li\u003e\n\u003cli\u003eTi-6Al-4V Titanium 1\/4\"-20 Socket Head Allen Screws (Anodized Blue)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Materials List --\u003e\n\u003cimg src=\"https:\/\/cdn11.bigcommerce.com\/s-xn4bghc5\/product_images\/uploaded_images\/made-in-usa.png\" style=\"max-width:100%\"\u003e\n\u003c!-- Made In USA --\u003e\n\u003ch3\u003eFeatured On\u003c\/h3\u003e\n\u003ch4\u003eEric Sutton's \/ Driver's Source Solo National Champion 996 Turbo\u003c\/h4\u003e\n\u003cimg src=\"https:\/\/cdn11.bigcommerce.com\/s-xn4bghc5\/images\/stencil\/original\/image-manager\/eric-sutton-996tt.jpg?t=1707863724\" style=\"max-width:100%\"\u003e \u003c!-- \u003ch4\u003eChelsea DeNofa's Cayman\u003c\/h4\u003e\n        \u003cimg class=\"__mce_add_custom__\" title=\"Chelsea DeNofa's Cayman\" src=\"https:\/\/cdn11.bigcommerce.com\/s-xn4bghc5\/images\/stencil\/original\/image-manager\/denofa-cayman.jpg?t=1756158451\" alt=\"DeNofa Cayman\" width=\"600\" height=\"400\" \/\u003e --\u003e\n\u003c!-- Featured On --\u003e\n\u003ch3\u003eNoise, Vibration, and Harshness (NVH)\u003c\/h3\u003e\n\u003cimg src=\"https:\/\/cdn11.bigcommerce.com\/s-xn4bghc5\/images\/stencil\/original\/image-manager\/nvh-rating-0.png?t=1723245776\" style=\"max-width:100%\"\u003e\n\u003cp\u003eThe OEM arms have spherical bearings so there isn't a pronounced difference in NVH in either the front or rear location.\u003c\/p\u003e\n\u003c!-- NVH Rating --\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003ch4\u003eFRONT \u0026amp; REAR (2 Kits per Vehicle)\u003c\/h4\u003e\n\u003cp\u003e1999 - 2005 Porsche 911 Carrera, Turbo, GT3 (996)\u003c\/p\u003e\n\u003cp\u003e2005 - 2012 Porsche 911 Carrera, Turbo, GT2 \/ GT3 (997)\u003c\/p\u003e\n\u003ch4\u003eFRONT ONLY\u003c\/h4\u003e\n\u003cp\u003e1997 - 2004 Porsche Boxster, Boxster S (986)\u003c\/p\u003e\n\u003cp\u003e2005 - 2012 Porsche Boxster, Boxster S (987)\u003c\/p\u003e\n\u003cp\u003e2005 - 2012 Porsche Cayman, Cayman S (987)\u003c\/p\u003e\n\u003c!-- Fitment List --\u003e\n\u003cp\u003eADDITIONAL FITMENT INFO\u003c\/p\u003e\n\u003ch4\u003eWILL THIS FIT A ...\u003c\/h4\u003e\n\u003cp\u003eWe limit the above applications to known fitments from testing and research. If you're unsure if this is the proper part for your application, send us an email.\u003c\/p\u003e\n\u003ch4\u003eTHIS SHOULD FIT MY CAR\u003c\/h4\u003e\n\u003cp\u003eOccassionally, parts will fit other vehicles not listed above. If you believe, or know, this part will fit your vehicle, send us an email and we'll work with you to confirm proper fitment.\u003c\/p\u003e\n\u003ch3\u003eReplaces OEM Part Number(s)\u003c\/h3\u003e\n\u003cp\u003eThis is a list of known OEM part numbers. OEMs constantly make changes to part numbers due to part updates, suppliers, etc so this may not be a complete list.\u003c\/p\u003e\n\u003cp\u003e997-331-043-02\u003cbr\u003e 997-331-043-01\u003cbr\u003e 996-341-043-03\u003cbr\u003e 996-341-043-06\u003c\/p\u003e\n\u003c!-- OEM Part Numbers --\u003e\n\u003ch3\u003eInstallation Instructions\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/www.dropbox.com\/scl\/fi\/91yw3e82mcobv74ieva09\/SPL-TR-991-Rev-C.pdf?rlkey=f55jjvs2wvroiru8n945agam2\u0026amp;st=vgrfe28z\u0026amp;dl=0\" target=\"_blank\"\u003eSPL Front Tension Arm Install Instructions\u003c\/a\u003e\u003c\/p\u003e\n\u003c!-- Install Link --\u003e \u003cbr\u003e\n\u003ch3\u003eMaintenance Parts\u003c\/h3\u003e\n\u003cp\u003eReplacement SPL Rod Ends\u003c\/p\u003e\n\u003cp\u003eSold as a pair. One pair per vehicle.\u003c\/p\u003e\n\u003c!-- Replacement Parts --\u003e\n\u003c!-- Product Description --\u003e","brand":"SPL Parts","offers":[{"title":"Default Title","offer_id":54600653734171,"sku":"SPL TR 996","price":699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/2123\/2667\/files\/SPL-TR-996-L1-0-Tension-Rod-HiRes__10572.1784623629.jpg?v=1794429178","url":"https:\/\/www.sub2speedhouse.com\/products\/spl-adjustable-caster-trailing-arms-porsche-911-996-997-and-boxster-cayman-986-987","provider":"SUB2 SPEEDHOUSE","version":"1.0","type":"link"}