1997 328is m52 secondary air pump delete. It took about 10 min. All you need is a 10 mil and a flat head. Secondary air pump pumps air into the exhaust to warm up the catalytic converters. Since I’m catless I won’t be needing that anymore.
Remember deleting this will give you a check engine light so your tuner needs to disable it.

Make sure to get the gasket!

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