been on stage 1 + for quite a time now. I am thinking of doing an exhuast mod and while i am at it, i am thinking if getting the secondary cat delete. It will be cut and weld a new pipe on. Would you recommend to run stage 2 map since i got 2 of 4 cats off? or it's a nono since the restriction is still applied too close to the turbo?
MY08 E92 335i M Sport|Wrap by Surrey Project |ETS Intercooler|VSRF Dp's|BMS OCC|BMC filter|CoBB AP|EBC Yellow & Coolcarbons rear|Alpina AT Map|Michelin PSS |CF grills,CF mirror,CF Performace spoiler|LCI light|CIC controller retrofit|2014 Mods: Birds B3 Suspension kit,Project Mu pads,Afe Filter and PTF Protune & Pilot sports cups. Gone:Forged FMIC, Eisenmann Race Quad, Eisenmann Sport Dual, Duke Dynamic Diffuser. Eibach Pro springs.