Looking for opinions /experience with aftermarket exhaust manifolds

[Rawze]

Seen lots of guys with them and try them,... Waste of money that gets you no measurable positive results above the factory manifold for any HP less than about 800+.

The only one that I have seen make any kind of slight difference is the intake for the CM870 will provide slight results but only when your pushing the engine above 550 HP or more.

I.E> -- It is nothing more than feel-good item for most people who want to haul freight instead of being a power hungry fool. Nothing but a serious waste.


Just because something "looks" like it can do better, does not mean it will. For an exhaust or intake manifold to be "better" by any measurable degree, you must first be starting to exceed the flow capacity of the one you already have.