Description Reviews The Powerflex Rear Trailing Arm Bushings eliminate torsional flex of the stock rear trailing arms under high stress conditions, such as track days and aggressive street driving and cornering. This allows for better handling characteristics as well as enhancing the longevity of future alignments. These will fit any MINI. While this is a great product, these are not normally used on most MINI's unless your car is totally bone stock. We normally replace the rear control arms with aftermarket lower rear control arms so that we can get enough adjustment out of the rear end when lowering the car. If you have any questions, give us a call! Powerflex polyurethane bushings are designed to decrease the amount of deflection in your car's suspension for better handling, more driver feedback, and better tire wear. Powerflex uses premium polyurethane materials for minimal NVH (noise, vibration, harshness) and increased longevity over the stock rubber bushings. Bushings come in pre-determined durometers (measured hardness) from Powerflex to work best in each particular location. The street bushing will work best for mostly everyone. They have been spec'd by Powerflex to be the best durometers for your application and are 70A (Yellow), 80A (Purple), and 95A (Black). Powerflex grease is supplied with every dynamic product. We suggest using only this grease for lubrication. Due to grooves and knurls cast into the material to hold the lubricant, bushings will rarely need re-lubing. We do not suggest using an "anti-seize" product for lubrication. Want a stiffer bushing? Have a track car? Try "The Black Series," a new range of bushings developed for Race, Rally and Circuit use. The Powerflex Black Series bushings are manufactured using a 95 Shore A compound to provide maximum control of chassis geometry. Warranty: All Powerflex bushings are made in the UK and come with a 1 year, unlimited mile warranty.