how did the power and torque look between 2500 and 5500? i'm on the fence about this or the m370 and most of my driving is in that range, so i'm trying to find the best usable power, without losing power up top (compared to stock)

I felt a big difference. I am waiting to get the dyno so as soon as I get that you will see the difference. It has a lot more power throughout the mid range.

Wait so how does tthis work I would have to send in my stock intake manifold?

No. U don't have to but if u do u get some money back.

No further information on this as well as a dyno sheet? Ever go back for a retune?

Lol no one ever tests anything, unreal.

What do you mean?

:icon08:
Can we get this translated into English?

Sorry, independent.

Any update on this mod? Who else made this plenum mod vs the motordyne.

What is the z1 upper manifold bored out to in mm?

AMMVQ did testing with dyno including a ported Motordyne and regular motordyne. He chose Z1 mani. the difference was minor mid range but Z1 kept up top iirc. I was leaning toward M370 but after his testing bang for buck I'm going to end up going Z1

with or with out a tune? Im betting the majority of that gain was tune related.

I bought this manifold for the HR on a bone stock car and the results were very discouraging