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11-06-2011, 06:32 PM | #2 |
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Drives: 12' 135i
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Location: San Jose, California
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around 15-20hp gain from running a catless dp. and not to mention the weight savings from stock is huge.
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11-06-2011, 07:58 PM | #3 |
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Turbos will spool quicker with DPs also and less backpressure for them to deal with when targeting higher boost levels. HP gains and a little less stress on turbos to achieve higher gains are probably the main reasons for most folks to add DPs rather than just a louder exhaust.
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11-06-2011, 08:06 PM | #4 |
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I agree with what has been said above. Less restriction, freer flowing air, turbos breathe more easily. ~15-20 hp gains just from switching to catless. On top of this, if you're running a tune, adding catless DPs will let you run a higher boost because of the easier breathing turbos. So on top of the gains from just breathing better, you can have more aggressive boost which leads to even more gains.
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