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  1. 1994-1997 OBS Power Stroke Aftermarket Performance
    I just finished up removing the stock cobra-neck downpipe from my truck. I was wondering if any of you have any advice when it comes to installing a 3" downpipe. I've heard people say that they cut the pinch weld on the firewall and/or hammer in the firewall to make it fit. I know I can figure...
  2. 1994-1997 Power Stroke Technical Info
    Getting ready to do a turbo back exhaust with 3 inch downpipe and as I was getting rid of the cobra head downpipe I noticed to my delight hopefully im correct anyways but it seems the downpipe had already been replaced by a 3 inch....the truck is a 95 and was purchased by my grandmother in 99 so...
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