The LSx 427 short block uses a new GM LSx cast iron block with 4.125" bore and 4.000” Stroke to produce the large 427ci.
We are able to build your engine to match just about any specs you desire, so if you do not see it just ask us! When you purchase one of our LS HP or Hot Rod Series Street Engines you will receive a full spec sheet listing the exact components your engine was built with. We will also provide you with a complete Set Up Guide as well as full phone tech support to aid you with the installation process. It is mandatory for you to contact Golen Engine Tech Support before starting your engine for the first time and you can reach our Tech Support Line at 1-800-591-9171 ext 2. Feel free to contact us anytime for help choosing the perfect performance engine combination!!