Just bolted up my new black ceramic coated cast iron hooker exhaust manifolds and they fit perfectly. I'm using ece motor mounts. They also come with pipe flanges for the exit. I purchase them from Josh at K-Y turbo out of Kentucky. He was very helpful by providing me with measurements. It also helped since holly Hooker was only five minutes from his facility he was able to just go there and pull them out of stock and shipping was quick. I originally tried to purchase them from summit but couldn't get for sure ship date. Oh yeah they were 410.00 shipped to California. I know some people are thinking that's a lot of money for cast manifold but I'm building a d/d and didn't want any trouble with headers. They are very nice and tuck tight against the block I must say and the exit flange don't make any stupid turns towards the block or frame. My other option were the thorley ls swap headers from summit but they were 615.00 plus shipping. Just thought I'd provide a little info thanks.
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