576 340/360 HEADS

According too Mopar they are the best standard head they built these as an improved 308 head the exhaust are far better than all others except the 308. The x heads are the simular Casting as the 915. These are 1.88 intakes. Could install 2.02s if you wanted to.but I don't think the need it

The springs are very strong. Too strong for std. Cam on the street.