I am looking into purchasing underdrive pulleys and possibly CAI for my '04 3.9. I was looking at Jegs and ChipsV6specialties. Can anyone give me pros or cons to either or other suggestions? I am new to the forum and mostly looking to improve fuel mileage. Appreciate any suggestions, thank you.

 

I got a dual exhaust and increased my mpg's by 4. Duals will help with your fuel economy.

 

Thanks for the come back. I would love to also do the duals but I thought I would do the simpler mods first. What type of setup did you use and about how much did it cost. Thanks

 

I have the '99 Magnaflow y-pipe system on my '96. It cost about 550 total.