Originally Posted by TF Rallyesport
Originally Posted by Doug Stirling
Originally Posted by a.k.a
Originally Posted by Doug Stirling
The RS-500 exhaust manifold is sleeved down in size IIRC

thats the downpipe not the manifold =- all ford did was weld a washer in it to try to control the back pressure from the T4
AKA, I was only going by what I've read (see the edited post above)...........But if Pete RS Specialist says that manifolds are not sleeved, then I am inclined to believe him.
down pipe was sleeved,not manifold,
someones going to say the head was different as well arent they.

I thank you sir
Going back to the start, essentially they are the same animal, parts from an RS500 engine can be replaced with the equivalent 2wd component and vice versa.