Howdy. Im sure there must be a post about this somewhere here but I can't find it. I've got a VRSF chargepipe on the way for my N55 M135i. The car currently has a MHD Stage 1 ots tune (98RON) so figured I should replace the stock charge pipe, which might blow. The stock charge pipe is brand new anyway, since the last one blew before the stage 1 map was even done. Im doing things step by step - next step would be FMIC or downpipe. Ive got a good deal on a VRSF catless downpipe atm and was w