Holden 186/202 krogdahl cylinder head.

[Jayme]

the car we swapped the manifold to tp dual plane had stock match ported bananas.

yes the neck is a bit of an odd shape, which is why the starr manifold cuts the whole thing off and replaces it. also I have heard of some people cutting off the bottom plate and some porting done inside the plenum then reattaching it.

[HQ355]

On the star manifolds it's just std bananas with the neck cut off and there own neck welded on with a 90mm TB. It wouldn't be hard to duplicate it, I'm thinking of doing it and also increasing the plenum volume, my only concern is I don't want to loose any down low power as its really nice on the freeway in 6th, I don't have to hear down to overtake or for hills

[Jayme]

as far as I know... its more about the runner length that gives you the low down torque. I think you will be ok with only plenum volume and neck mods.

[vlad01]

You won't loose any torque down low, should increase with more plenum volume.

[vlt304]

the best mod for a stock manifold is to cut the neck off weld a plate to it and put the throttle body forward facing like an ls. it is easy and works and opens up all sorts of throttle body options.

[Dylan]

With a nice 90 degree bend on that it looks like it wouldn't be to hard to match it up to the factory air box.

[vlt304]

haha funny you say that about the factory air box.

[HQ355]

That air filter in factory box would have to be a restriction
? Look at VT onwards the filters are much bigger

[vlt304]

it is a k&n in the box and the lower half of the box met the hole saw alot.

[vlad01]

it is a k&n in the box and the lower half of the box met the hole saw alot.

yep the issue is the box itself.