Description Reviews The Powerflex Upper Engine Bushing slides into the upper mount on early generation 1 cars and is designed to stiffen the factory mount and stop excess rocking caused by the engine itself. For a full package pair it with the front bushing to eliminate all movement. Most of the movement is located at the rear main bushing so you may want to start with one bushing and see how it feels. 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 copper-based grease is supplied with every dynamic product. We suggest using only a copper-based 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. Currently Special Order at this time, give us a call to order yours today! Warranty: All Powerflex bushings are made in the UK and come with a 1 year, unlimited mile warranty. Note: This is an easy install for anyone with basic hand tools. This bushing fits Early R53 models only. 1 Review 5 Worth every Penny Posted by Unknown on 7th Mar 2016 great product, not to stiff for daily driving. But you get to feel the crisp engine and shift response.