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Performance upgrades
New guy here...
My new-to-me 2012 128i with 61,000 miles now has the Stage 3 intake, BMW Euro Air Box with K&N filter, a BMW PE, and a BPC tune. It's also got the Steptronic transmission.
For my next step, I had hoped to go with AA or Supersprint catless headers and another BPC tune, leaving my secondary cats and resonator in place.
I'm reading that this may result in a loud and stinky beast.
Not sure I should press on or stay where I am. BPC dyno'd another car with the same equipment I presently have at 217. I was hoping to get up to around 240whp.
Anyone care to sway me one way or the other?
TIA
Last edited by varoadking; 01-10-2018 at 12:06 AM..
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