Ive been running a 'gravity' one for a few years now and had no issues. Doesnt have brackets for the heat sheilds though but some exhaust wrap cures alot of that problem.

Hi Joesson,
I've had a night of it.  I loosened the lower mounts to get the out of the way.  That allowed the new manifold to sit on the narrow ends of the studs.  But too tight to go any further and would damage the stud threads if I tried.  I've replaced a couple of the studs but they are all in good shape.  I offered up the old gasket to the new manifold and theres a couple of mm out. 

I put the stock manifold back on to make sure I've not buggered something up and it was fine.

Frustrated and given up for tonight.  Will look at alternative tomorrow.  Thanks for your advice.

@robini

From my reading of this thread it seems that you have removed the OE manifold and are now trying to place the new manifold onto the retained head studs.
It could be that there are existing  lower mounts in the way and hindering alignment.
Rather than offering the new manifold to the retained studs with risk of damage have  you considered checking the hole / stud positions with the OE gasket/ or the new gasket?
For information, the head studs are removable / replaceable.

There are cheaper inferior ones than yours.  The majority aren't machined to use crush gaskets.

It's not the best in the UK though, that's a company called Zero exhausts, but he's reportedly going to be retiring soon.

If you combine your new catback with a Zero racecat, you will get a little bit more sound and better perfomance too.

Even with stock silencer, the sound is more sporty with the Zero cat. Personally I would replace the cat before the catback. But I am getting old and sick of noisy cars. I only want better sounding exhausts.  😄

Thanks Carolyn and everyone.

Is this the one that most people use then?  At least I can get rid of the heat shields. 

Just had another go.  It's too close to not being for the 1ZZ I think.  If I remove the fouling lower support, I can get the narrow end of each stud in the hole.  Got to stop myself as I can see me damaging the threads and then not being able to get the lower supports to line up.  I'll speak to the supplier on Monday and see what they say. 

I'll have the rest of the weekend off!  It's been good fun up until now though.

if it is 2zz-fit the outside holes on the flange are 'high',  the 1zz low.

I looked up the website, nothing else obvious that they may have mixed it up with.  Is there a part number on it you can check on the web?

The chances are if you call them up they're going to think you're a blether.

It sounds like you have the existing one off.  If I were you I'd fit it where it can then take pics showing where it doesn't line-up.

And when you do get one that fits, don't use the perforated gasket, they're weak junk usually.  The existing one can usually be re-used, - it's common practice.

I susoect it's for a 2ZZ.

Send it back.

https://www.ebay.co.uk/itm/204135729654?itmmeta=01KB8JJMSR9F7JHSDBJ4XQ57KK&hash=item2f877009f6:g:0kUAAOSwpstjXW92