We use callies cores because they are top of the line. Absolutely ask anyone in the country & they'll tell you they love Callies products. With these camshafts you get a cnc cut camshaft on either 5150 or 8620 material! The key is finding a supplier that guarantees to be very close to requested specs, guarantee against grinder burning, and use a CNC Camshaft grinder.
There's been so many camshaft failures on these boards that we thought the best way to insure that doesn't happen is use absolutely the best cores available.
Jason
Texas Speed
www.texas-speed.com