so from what im getting is this downpipe worth it? i used to know a guy who owned Bell Turbo in Stockton, California... he did mostly big riggs but man this old man knew his suff. talking bout atomspheric pressure to sea level determins what type of turbo you would need. but the main thing he states is the exauste flow needs to have the least resistance. he also stated 3 inches is overkill as he laugh at our mini turbo compared to the tire size turbos he worked with saying there was no point to that. so i figuered why 3 inches? 2.5 45degree mandrel is better than 2.25 90degree crush or two 3inch 90degree bends. think about it its not just about the volume at what its flows but the current in which i needs to flow effortlessly! is that even a word? hehe