These things are huge. Ive worked with headers before but never big block stuff like this. I got them from Ebay for $220 which saved me $150! These things are monsters with 2 inch primaries and a 3.5 inch collector. I'm not sure if I want to reduce that to 3 or 2.5 inch. My 460 is nothing racey. Its got D0VE-C heads with home ported exhaust ports, cam, Torker II intake and 750 holley VS. Just one of these headers almost covers my entire couch, lol. I think I got a good deal with a used 460 starter, brand new timing chain cover, conversion headers, and 460 motorsports distributor for $550.