heres the deal. You get the header, a pipe takes that to the cat, and rest is just called the catback. This would have a big hp boost of you did it all, im guessing 10 for header, cat prob adds 3-5, and catback another 5-10. so about 20-25hp is my guess. maybe 30. Intake, a clean, non restrictive intake is a good thing. you have a K&N filter right? I like K&N, but is it just a filter in the stock box. An aftermarket intake will get rid of the box and expose the filter, letting it breath much better. expect 8-10hp over stock. boost controller does exactly that, controls your boost. you can up the boost, which gives more hp, but also more strain on the turbo, so good idea to get intercooler/turbo timer to keep that in good shape. good luck!
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