360 LA installing Promaxx Aluminum heads

rumblefish360 said
IMO - Wrong Too short

View attachment 1715961074

IMO- Right, maybe even longer would be good. But they maybe build dependent for the amount of pipe needed for max low end torque.

View attachment 1715961075

Yes, the collector is too short. Originally those collectors came without flanges. Also in the box with the headers were two 18 inch extensions plus 8 four inch and 8 six inch primary pipe extensions.

So yeah, those collectors are real short.