We are currently working on a modification to strengthen the engine block fitted to the Vauxhall Astra VXR (240), most of you will have heard of the wedge's that are available but we are working on a full enclosure which will be fitted in the existing water jacket to offer a uniform support to the cylinder liner. The purpose of this modification is to help prevent deformation of the cylinder liner when increased boost pressures are use, this deformation will lead to premature cylinder cracking and head gasket failure.