I just put on CNT racing HFC's and ebay Y-Pipe and HPS intake tubes, I noticed a good gain in HP. The sound is wayyy different, but in a good way, you can actually hear your exhaust now. If you do a search there are some videos of guys that have changed to HFC with sound clips.
Just to tide you over for 100 you can get the HPS intake tubes, they are good for about 6-8 hp over stock..
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2013 Mustang GT, 6M, Track Pack & Leather Recaros
2011 Pearl White 6M /Sport Pkg - SOLD
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