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so deleting the cats would actually make a significant power gain?
and if I do decide to remove the cats...I should do that before tuning with AA. so they can tune the software precisely and properly towards having better exhaust flow?
Is that correct?
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Current:
2019 BMW X5 40i - Carbon Black/Tartufo Individual Leather
2020 Range Rover HSE - Black/Black
2020 Audi R8 V10 Performance Spyder 6MT - Ascari Blue/Black
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