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C&L CAI has the best numbers, and sct xcal 2 is best for tuners. I have a c&l/xcal2,and its great. I only have experience with dougs tunes from b a m a c h i p s .com(take out spaces) and i love them. I have the 93 race tune 93 torque tune and 87 perf. I run the 93 race, just because it is great, it has great low end torque and it pulls through the rest of the gear very strong. I have a manual though, so you would probubly want doug's torque tunes, it will make your auto ship super hard with great pull.