Upgrade your worn-out rubber motor and transmission mounts with this Prothane polyurethane kit. Part number 4-1903 includes mounts that are stiffer than stock, reducing engine movement for better throttle response and shifting. They’re precision-made for a perfect fit and come pre-lubed with super grease to keep them quiet. Made from premium-grade red polyurethane, they’re durable and provide the rigidity needed for performance driving while still absorbing vibration. Whether you’re building a street machine or just want to tighten up your daily driver, these mounts are a solid improvement over soft factory rubber. Easy to install and built to last.