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Message: <blockquote data-quote="Mystic SVT" data-source="post: 836747" data-attributes="member: 12909"><a href="http://forums.corral.net/forums/showthread.php?p=8442189" target="_blank">http://forums.corral.net/forums/showthread.php?p=8442189</a>This link will help you see where they are located and what they look like. The purpose of IMRC's is that when the engine is operating below 3450rpm (i think thats the correct rpm) the IMRCs have the butterflys closed thus the engine is only running on 16 intake valves. This helps to make more torque since on low end since the B-heads on 96-98 cobras had low intake air velocity. Over time the actuator that opens and closes the IMRCs goes out and the car will run on 16 intake valves all the way up to redline, this will kill horsepower. Sometimes they become gunked up with oil since the injector shoots down only one of the 2 valves, this means only that one valve of the two gets cleaned up by the fuel. If you do delete them you will most likely loose some tq but if you swap to 4.10 gears or higher you will not notice this loss. I actually deleted mine with 3.55 gears still in the car and I did not notice a loss in tq, the car actually felt much stronger after 3600rpm.</blockquote>