FE SPECIALTIES TEST STAND VIDEO UPDATE!! RS 455ci This motor has quite a history! We built this engine 22 years ago!! Thru the process of restoring cars and then changing directions so to speak with the car, and then changing 3 or 4 different shops, we get a call that we needed to interject to save the build! Engine came to us in a quite different configuration than the original build! Our trick C4 iron stage 3 heads were discarded for some off the shelf Edelbrock heads that flowed 25 cfm less!