Quote:
Originally Posted by Mercury Bullet
The RS and mustang are not the same engine.
They were originally, until Ford continually blew them up during testing(RS). It was so bad it put the program in jeopardy.
Ford went to cosworth for help.
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I know and Cosworth changed head and block just enough to necessitate a different head gasket,
the bigger exhaust housing was put on the turbo to reduce back pressure at higher boost I mentioned earlier.
Both engines still have similar issues when you start upping the boost, the gaskets fail in similar position
on cylinders 2 and 3.