Thread: 2000 F-250 straight pipe question- new to PS
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  #12 (permalink)  
Old 12-06-2008, 03:24 PM
dmd dmd is offline
Compression Ignition Addict
  

Join Date: Oct 2008
Posts: 280
When you go for the down-pipe, use 4-inch there too. Why use 3-1/2 then
4 on the rest...? All the mfgs use 4-in for the down pipe unless you have
a OBS.
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