cold air intake.
the top 3 intakes are probably the evoms, ITG maxogen and forge twintake.
best intercooler for your money will be either the S3 IC, forge twintercooler or THS intercooler.
exhausts, you want to look into pipewerx, blueflame and miltek
High pressure fuel pump(HPFP) cheapest option is th autotech. apr is twice the price and IMO not worth the extra.
remap wise, the top contenders on here are revo, but APR, jabba, giac and shark performance are all worth a punt as well