[pitmitch910]

[QUOTE1996-1998 Cobras have an aluminum, side-entry throttle body intake manifold with long runners. The runners curve 180 degrees into the cylinder head ports and in between them are things called “IMRCs” or Intake Manifold Runner Controllers. The job of these is to maintain torque by only opening one intake valve and one exhaust valve until a given RPM (which Ford set at 3250 RPMs stock). The 1996 and most of 1997 IMRCs are made of metal which get gummed up quite a bit from the carbon that is found after engine combustion. Some late model 1997s and1998s have a ceramic style IMRC plate that doesn’t get nearly as dirty as the 1996-1997s do. IMRC deletes are out there but unless you have a poweradder that is constant like a turbocharger or supercharger, you will lose torque and have significant driveability issues under and until 3200 RPMs. Eric Duncan did some tests and found that you can actually gain quite a bit of torque by making the IMRCs open up at close to 4000 RPMs. This intake manifold will only fit on B style heads. [/quote]

so is it recomended to take the intake apart to clean the IMRC's if u have a metal one?

Good Sticky tho def put on favorites list