Originally posted by Derk2000:
mikey - there was a guy who dyno'd w/ the MSDS headers and the SHOShop pipe, then with the MSDS pipe and the MSDS pipe had a few hp on the SHO pipe. Theory is that the bend in there is for extra hp...the stock pipe is just ugly on the inside.
The power loss of the stock Y-pipe is how Ford crushed the pipes together. With a good flowing y-pipe, even with the bend, HP is gained.
Here is that Y-pipe comparison installed on MSDS headers.
