Quote: if the post-Extrude Hone manifolds are still off the engine and available, perhaps it would be a good idea to make some templates of the port shapes the EH process created?
if these templates were then scanned and added to the archives, perhaps other factory manifold owners using a grinder could be very close to the gains found?
how do you get to the areas that you can't even SEE ??
the extrude hone process mostly SMOOTHES (polishes) the internal surface of the manifold .
