Duramax 6600 camshaft

healthy power gains from idle to 4200 rpm, 8% increase in torque without any compromise in reliability. designed to drop -in a stock duramax engine and be used as a daily driver , excellent boost response for towing and keeps good fuel mileage that the duramax is known for. new lift specs are .410" intake /.425"exhaust 264 /260 degree 113 lobe center and uses the stock valve springs and pushrods. core exchange required ( add 349$ with no core)