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Old 01-01-2012, 09:22 AM
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NWRQC NWRQC is offline
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Join Date: Dec 2011
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I noticed very little change in mpg until I added the third piece to my set-up. First was the intake (spectre), louder and no mentionable change in power or fuel economy. Second was the Programmer, decent bump in power and very minimal change in fuel economy. Worth the money spent. Third was the exhaust. I replaced the muffler with an 18" Magnaflow and removed the resonator (3" tailpipe). Once again a decent bump in power and noticable mpg increase. I think once I added the exhaust it allowed the intake to reach it's potential, and same for the programmer. They all work together and compliment one another. Ive seen an increase of a solid 8% around town and still figuring out the highway mpg (I dont drive my highway). All in all 8-10% increase.
I would start with replacing the muffler and removing the resonator. Keep the piping you already have. Then find a good deal in a CAI.
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2007 6.7| EFI-Live | ARP 425's | T4 S366 | AFE | Draconian tuned TCM
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