+1 for the post-MAF tubes. Add to that some K&N or AFE drop-in filters plus your exhaust of choice. I would do a search in this forum and on youtube for a general idea of sound. I went with the EBay y-pipe (Surewin) and Top Speed catback exhaust due to the fact that I didn't want it overly loud for my DD. I am very happy with the sound and affordability. It gave the car a nice kick in the pants performance-wise as well.
Hope this helps!!
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