And then there is this.....Today, we are going to take a look at the smallest turbocharger currently offered by HKS, the GT-SS. Officially, HKS rates the GT-SS turbo for 280ps, which is roughly 276hp. It is worth noting that HKS power ratings are indicative of wheel horsepower, rather than flywheel horsepower. In practice, the hks gt-ss has been shown to develop as much as 320ps, or around 315hp. HKS currently offers the GT-SS in various engine specific packages to make installation and bolt on affair. All GT-SS kits come with all required gaskets, bolts and fittings.