ISR Performance Solid Subframe Inserts | 1989-1998 Nissan 240SX (IS-AZ001)ISR Performance Solid Subframe Inserts 19891998 Nissan 240SX KA24DE KA24E Part #: IS AZ001 Overview If you're restoring or upgrading your Nissan 240SX from the late '80s to the late '90s, ISR Performance's Solid Subframe Inserts are an essential component to enhance your vehicle's handling and stability. Over time, factory rubber bushings can deteriorate, leading to increased flex, compromised ride quality, and reduced responsiveness. These high