Quote:
Originally Posted by kirby135i
whats the big deal about downpipes? i know about emissions but I dont see how they could cause problems esp HPFP failures.
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Logic would dictate that since there is less back pressure in the exhaust system by using DPs that engine would'nt need to work as hard as it does in stock form, actually increasing engine longevity.
Too bad logic is the last thing on BMW's mind when it comes to voiding your warrenty.
PS, I wouldnt do a tune unless I had the proper supporting mods, FMIC at the minimum.
I have a set of PS2s on my car and it a massive difference from stock.