I finally bought my first Subaru. 03 WRX. Test drove it and bought it same day. Anyways I'm very new to daily driving a turbo car. And the gearing is very different compared to my Civic Si I have. I seem to have a problem with building boost from regular driving. Is that normal? It don't even seem like I'm giving it a quarter throttle and it's spooling a little. I didn't know if that was normal or if that would hurt it? Also how do I know if my WRX has a optional Subaru skid-plate (rear differential)? I read HKS exhaust systems won't clear that? And I plan on buying an HKS exhaust in the future.