I have been running a set of TTI headers on my 383 for about 15 years now and aside from being ceramic re-coated twice they are still in great shape. The mechanic who is doing my engine install really wants me to switch back to stock HP manifolds for all the reason we know, they burn the wires, they get in the way of lots of stuff and generally take up too much room. He found some stock HP manifolds on Year One for about $650 (I had no idea they were being reproduced)and was asking me if i wanted to put them on in place of the headers. He feels that the stock HP manifolds will flow almost as good as the long tube headers. He is doing some massaging on the tubes to give more clearance for the wires and switching some of the 90 degrees plug ends to straight boots so help as well.




I am going to stay with the existing TTI headers myself, but thought i would get some input on this from you all if they stock manifolds are worth the extra hassle for any HP gains?


Thanks
Stu