Hey, I just bought a 2007 Audi A4 2.0t Quattro. I bought it for a steal because it had a misfire. Upon further diagnostics I found that it had a cracked valve and a piece scored the cylinder. I was wondering if anyone could recommend any internal engine upgrades that would boost my output when I'm done. Thanks in advance!

Edit: also if you have any tips about rebuilding this particular engine, it's much appreciated!