Sorry if this question has been raised already but couldn't find the answer by a search. I have had my DCT ES for about 6 weeks now and absolutely love it! Like most though, I think it could do with more horespower. I have heard that the ECU will limit horsepower without a tune so my question is how much useable horsepower can be added to a DCT ES without a tune and what is the most economical mods to achieve this this? For instance will adding a K&N filter or a shorty big gulp plus an intercooler resonator delete get me to the maximum usable horsepower without a tune or will I need a downpipe. If I get a downpipe is is worth getting an intake or will the downpipe itself be enough or is there a combination of mods that works with a downpipe to achieve max useable horsepower gains.