Arma 134 Report post Posted March 22, 2019 (edited) 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 wondering if this can be installed safely while keeping the current stage 1 tune and not throwing CEL's all the time. I'm going to replace the charge pipe myself but not the downpipe - i'm guessing any shop (such as Euro Surgeon) would be able to install it? Keen to hear thoughts/ideas Edited March 24, 2019 by Arma Quote Share this post Link to post Share on other sites
blake12 23 Report post Posted April 17, 2019 (edited) Down pipes will throw a light with no tune but it won't matter. With any MHD tune regardless of stage, you won't have that issue. Downpipes don't do a huge amount for performance unless you are planning on going to 2 upwards. Make sure to get a quote before install. My shop ended up taking hours longer than they anticipated Edited April 17, 2019 by blake12 1 Quote Share this post Link to post Share on other sites
Navin 180 Report post Posted April 17, 2019 (edited) I was quoted $600-$900 plus GST for the labour alone by a BMW specialist for my e82 n55. Not sure if the F chassis cars would mean an easier install but certainly not cheap. Edited April 17, 2019 by Navin 1 Quote Share this post Link to post Share on other sites
