Originally Posted by LotusBoy
I like cats, but prefer dogs ... Anyway, Mr Zuzu, we're still waiting for your dyno's ! According to the Milltek site, mid-pipes without cats (or dogs) should release around 11hp extra. The muffler itself (from Milltek) is only a 5hp gain, and costs 4 times more...
Ok.. have gained 12Kw ATW with the N55 mids..
Dyno chart shows runs with "M" button OFF at 242.5Kw, then with "M" button activated on 258.1Kw ATW
Stock runs with OEM 1M mid pipe with "M" button activated was 246Kw ATW.
"M" button activated makes a 16Kw difference on Dyno charts..