help with 340 hp manifolds and TTI 2.5 exhaust

tonysrt said
I did tti 21/2 pipes on a 74 Duster with the 340 manifolds and there are 2 different pipes from the manifold. They sent me the wrong one first time but got it sorted out with 2nd pipe. Mine is a column shift with a 727 and I went with a h pipe instead of x.

2 different pipes? do you have the HP or TA/aar style or the 73 style with the holes to mount a heat stove? the h and x pipes overlay the same so there shouldnt be any difference in the inlet dimensions on those.

Tsully said
Did you order the TTI’s new or bought them off of someone?

TTI makes the headpipes specifically for the manifolds your running.

Early HP, the late HP, standard 273-318 manifolds and so on... the head pipes are bent differently for each year style and each side.

early hp or late hp? my manifolds are dated mid 67 so they probably came off an early 68 GTS. all i did was tell them i had 2863553 and 2863549 manifolds going on a71 dart with a 4 speed, are the 70 dart / ta & aar cuda ones different. i know there are inny and outty casting number differences but i am not aware of the actual shape of the castings being different from year to year.

heres what i have: