Forge Motorsport FMAC048 or T3 Replacement DiaphragmA replacement diaphragm for your Forge Motorsport actuator. Our actuators have two body sizes. This diaphragm is for the larger body, the (048) series (T3), with a diaphragm diameter of approximately 80mm. All Forge Motorsport products come with a limited lifetime warranty. All warranty claims must be accompanied by the original proof of purchase to enable us to help you. Failure to supply this proof will result in your claim or enquiry being denied.