The Subaru Group N engine and transmission mounts are a great way improve the overall driving experience of your WRX or STI. The stock WRX & STI mounts are made of a softer material which can make spirited driving feel vague and sloppy. The Subaru Group N Mounts utilize a higher durometer polyurethane, which will firm up the driveline and add a more crisp and accurate shift feel without significantly increasing noise, vibration or harshness. An excellent supporting modification to consider when pulling your motor or transmission for internal work.