Unlock the true potential of your Grand National or GNX with the TRE Buick 3.8 Grand National Crate Engine. Expertly crafted by Tony's, our engine offers precision engineering designed to deliver exceptional performance and durability. If you have a grand national or GNX and looking to really put down some impressive numbers then give us a call and see what we can do for your grand national or GNX. Enhance your driving experience with an engine that represents the pinnacle of automotive engineering. Rev up your performance with Tony's dedication to excellence.