The Big Nasty series cams are designed for serious street and strip applications. We have a wide range of specifications to help allow you to optimize your combination of converter, heads, gear ratio and RPM range. These cams utilize the high quality Cam Motion smooth cam lobes designed for quiet valve train operation and to make power and maximum upper RPM stability allowing you to maximize engine performance without abusing the valve train. Cams are manufactured on our 3 bolt cam cores made of 8620 aircraft quality steel. They come made exactly to these specs with cam doctor verification included in the box. You should expect these cams to work well, but only if you put them in the correct build. Also, you need to be careful because some of these cams may have piston to valve clearance issues. New valve springs and lifters highly recommended. If you are not sure about your selection go to our custom camshafts section and we will recommend the correct cam.