034 Motorsport Australia - Billet Aluminium Rear Subframe Mount Insert Kit - BMW E80/E90 Chassis. The 034Motorsport Billet Aluminium Rear Subframe Mount Insert Kit for E9X BMW models is designed to limit movement in the factory rear subframe mounts to maintain proper suspension geometry when cornering, and improve the responsiveness of the rear suspension and differential.By filling small voids in the four factory mounts as well as limiting vertical movement, this insert set eliminates the associated slop to ensure that you experience a more refined, connected driving experience, especially when driving at the limit. These billet aluminium parts will not pack and wear over time, and offer a lasting performance improvement. 034Motorsport is pleased to present Billet Aluminium Rear Subframe Mount Inserts for E9X BMW models! E9X BMWs use rubber rear subframe mounts which deflect under load, causing the rear end to feel vague and loose, as well as leading to less-than-optimal suspension geometry and increased understeer. These precision-machined billet aluminium inserts are designed to fill voids in the factory rear subframe mounts, and limit subframe movement without sacrificing ride quality or introducing any perceivable additional noise, vibration, or harshness into the cabin. The result is a more refined, connected driving experience, as well as improved effectiveness of aftermarket rear sway bar upgrades and suspension components. Designed to work in conjunction with the factory rubber mounts, this insert package was engineered using CAD software and thoroughly tested and refined to provide a significant improvement in handling performance and feel. These inserts were tested extensively on multiple enthusiast-owned E9X BMW models before release. Installation is very simple and is completely reversible. Features: T6-6061 Billet Aluminium Construction CNC-Machined In-House Clear Anodized Finish for Durability Engineered to Fill Voids in Factory Rear Subframe Mounts Helps Maintain Proper Suspension Geometry When Cornering Reduces Rear Subframe Movement During Launches & Acceleration Improves Shifting Feel, Resulting in Crisper Shifts Virtually No Additional NVH Transfer Inside Cabin Easy, Straightforward Installation What's Included: 034Motorsport Billet Aluminium E9X BMW Rear Subframe Insert - Front Upper (Pair) 034Motorsport Billet Aluminium E9X BMW Rear Subframe Insert - Front Lower (Pair) 034Motorsport Billet Aluminium E9X BMW Rear Subframe Insert - Rear Upper (Pair) 034Motorsport Billet Aluminium E9X BMW Rear Subframe Insert - Rear Lower (Pair) Installation Instructions: PDF Fitment: E81 1-Series (02/2006 — 12/2011): 116i, 118i, 120i, 130i E87 1-Series (02/2003 — 02/2007): 116i, 118i, 120i, 130i E87 1-Series LCI (01/2006 — 06/2011): 116i, 118i, 120i, 130i E88 1-Series (11/2006 — 10/2013): 118i, 120i, 125i, 128i, 135i E82 1-Series (11/2006 — 10/2013): 120i, 125i, 128i, 135i E90 3-Series (02/2004 — 09/2008): 316i, 318i, 320i, 323i, 325i/325xi, 328i/328xi, 330i/330xi, 335i/335xi E90 3-Series LCI (07/2007 — 02/2012): 316i, 318i, 320i, 323i, 325i/325xi, 328i/328xi, 330i/330xi, 335i/335xi E91 3-Series (02/2004 — 08/2008): 318i, 320i, 335i E91 3-Series LCI (07/2007 — 05/2012) 316i, 318i, 320i E92 3-Series (05/2005 — 02/2010): 316i, 320i, 325i, 328i/328xi, 330i/330xi, 335i/335xi E92 3-Series LCI (11/2008 — 06/2013): 316i, 318i, 320i, 325i, 328i/328xi, 330i/330xi, 335i/335xi E93 3-Series (09/2005 — 02/2010): 320i, 323i, 325i, 328i, 330i, 335i E93 3-Series LCI (11/2008 — 10/2013): 318i, 320i, 323i, 325i, 328i, 330i, 335i, 335is