Originally Posted by andrey_gta
I dont think this all.
Raceman mentioned that step 1 is to bump 125i to 130i 265hp, that's to tweak the valvetronic & disa of the 125i.
Step 2 is to tune that 265hp that more & use secondary cat delete exhaust.
I think DISA and AA only get us step 1
And any exhaust and intake max out at 10 hp total
no they don't, headers without primary cats alone is at least 10, then deleting the secondary cats with a nice sized cat back is at least another 10, more likely 15 on the n52