Yep, I ordered your downpipe wedensday and got it Friday.
The 7% was compared to stock. Stock is said to be 231hp/500nm. didn't get a dyno before remapping first time.
Remap only with 7% more fuel gave me aprox 260hp/600Nm. a gain of aprox 30hp/100nm
And after adding the bigger IC we did a remap again with almost no difference on the dyno. But it gave a big change in the way mid accelerations are done :-)
'06 E91 330dA Sparkling Graphite|19" AvantGarde M359 Satin Black|335i brakes|Eibach|Wagner|Ecotune|Turbo Dynamics|Zimmermann|Hawk