Hello Experts of E60,

I have 2004 525i

I need to upgrade on performance and I need your expert advice. What performance parts should I get? Vendors?

Thank you for the wonderful help E60 members!

 

Easiest/cheapest way to make the 525i a littler more speedy is to get a RPi Scoop with BMC high flow filter. Also, you might want to buy a Sprint Booster. Do a search up there in the search bar on sprint booster to figure out what it is/does. For the RPi Scoop/filter combo, you can contact member Nerweezy, he works for Trinity Autosport and is a great vendor. If you want an exhaust in the near future, go with the RPi axle back exhaust, it has amazing sound and has proven gains on the dyno. It's a little pricey, $799 I believe.

 

Get a sprint booster first.

 

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How much power does the RPi Scoop with BMC high flow filter give you?

 

The faster you go the more HP you get. Expect 6-10 HP TO THE WHEELS with 70mph airflow