hooker comp headers fit big block chevies/ gmc's 73-87 1/2 and 3/4 4x4 model trucks or blazers with an automatic. Doesn't require frame cutting to fit like the 2wd versions. Used them as a test fit and went small block after all. Never been ran. Comes with gaskets and hardware. Paint is black and peeling a little as it was like that when i bought them. 150.00 + shipping.