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Why not grab the scangauge? doesn't have to be calibrated to a vehicle to compare a to b. I think they're good for aeromods, but don't know if I would trust it to measure engine mods. my sg thought I was getting in the neighborhood of 10% improvement when I put on a HAI, but from my fills it was 0-2%. I took it off anyway because once I built it to pull enough heat on the highway it had drivability issues in town. With a p/s delete you know it will use less fuel, and the down side is if you could still parallel park. I would of liked to test this on my own car, but the biggest reason to test the p/s delete is only personal satisfaction
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