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Hello, first time posting here not sure what to expect. So I have an 07 xc70 I recently purchased and have a few questions about some performance mods I would like to do. So this car has about 175k miles and I want to boost my horse power up to the high 200’s if not low 300’s it’s my daily and I want a bit more juice for fun but I don’t want to destroy it too bad I love the i5 sound and the entire car in general. What are some things I can do to increase the horsepower but keep it from killing itself. Also what are some good exhaust mufflers or kits I can buy that increase the sound at higher rpms but not as much at low rpms it just sounds so amazing at high revs and I want to emphasize that as I’m driving. Any feedback or suggestions would be great. Thanks!