I think I have the same disease as you!
Where did you buy the manifold ?
I saw that MWR had some for sale too
the ideal would be to be able to find only the runners
I bought the Corolla manifold (plenum and runners) from MWR. If you were to ask Webbs Styling to port the runners, he charged me Ā£50 surcharge for the runners themselves, so if I return my runners to him, heāll refund me Ā£50ā¦ itās a fair amount to post mine to him, so Iām happy to just keep mine for any future projectsā¦ Youāll need the gasket that goes between the runners and the r9k velocity stacks - keep that in mind too 
ok, thanks for the info, did you buy manifold new or used like this link ? : https://www.monkeywrenchracing.com/product/toyota-oem-intake-manifold-corollamatrix-2zz-ge-used/
I would ask Webbs Styling to do it for me too but Iām in France and itās quite complicated now since the brexitā¦ 
I bought a used one from MWR - just like that Iāll be trying to fit it all together over the weekend hopefully - then Iāll know for certain it fits, not just hoping/guessing, lol!
I keep my fingers crossed for you
You should be able to fit a larger throttle body. I think people are fitting Infiniti Q45 TBs. Might be worth if confirmed that the width of the TBs align with the one of the intake plenum.
Iām still doing the job, but I can confirm the r9ktuned plenum does fit in the space we have availableā¦ but itās much tighter than the OEM intakeā¦
Nice work Matt !
It is strage that the Rk9 set up is tighter than the OEM, as based on pitcures, I would have bet that the OEM is biggerā¦anyway, all good news ! And well done for trying these things, which to my knowledge, has never been done on a Lotus before. The question now is whether youāll be required to do a remap to get most of the benefits this intake may bring. I suspect you would.
Nico
Thanks Nico!
Yeah, I was surprised to find it was a tight fit in the end, itās just that the runners shift the whole unit slightly further towards the firewall than the original Celica manifoldā¦ It looks like itāll be fine, but I think I need to relocate the 2 separate relays that were previously in their default position, and if you have the OEM ECU I think that might be another issue too - luckily my EMU Black is smaller and positioned off to the side a bitā¦
I agree, itāll need tuning to map it properly - will get that sorted in due courseā¦ in the meantime, I have a Wideband lambda and the ECU can adjust to compensate for the (small) extra airā¦ Just need to get it working and back together
I didnāt think that the new runners were so far away from the plenum.
Anyway, congratulations for the assembly. Iāll have to adapt the air intake pipe.
Canāt wait to hear what you think about the modification 
Is there a update after the install Matt? 
Still waiting on some resultsā¦ I was plagued by a slight leak between the mating faces of the runners and the new plenumā¦ I got so fed up (and accidentally gave myself carbon monoxide poising chasing the leakā¦) that I asked TrackGroup to try to sort it for me, which theyāre currently doing, along with a number of other bits I wanted sortingā¦. Hopefully will hear from them soonā¦ Iāll let you know if I discover anything!
Iām becoming increasingly sceptical about the high output numbers of NA 2ZZs across the world - unless I go for different pistons and increase the compression ratio, Iām basically reaching the end of the mod list, and despite that Iām at roughly 210bhp (before this intake mod) which is lower than some people who have just had a manifold and ECUā¦ which is nuts! 
Tested at the same place, tuned by the same guyā¦ different days thoughā¦
I am not sure, and I have not seen many stock or mildly modified 2ZZ NA engines getting much more than 210 bhpā¦this is already quite healthy ! There might be some further poneys to find with a fully adjustable ECU (e.g. motec) and the engine internal modification you mentioned above, bu what will you be getting from all of thisā¦230bhp maybeā¦not much moreā¦and the cost will be quite high.
Full blown NA engines with corsworth internals, etcā¦ have been measured at around 245bhp in Australia or the US:
Cosworth 2ZZ Build #LT001 14:1 - first dyno run on PUMP fuel - YouTube
Lotus 2ZZ/Cosworth lives again and again and again... - YouTube
Just checking in with an updateā¦ Went to Donington with MSVTrackdays on Monday, had a great time! Car running really nicely and got lots of laps in, with some great weather!
Gratuitous photos incoming!
I do need some new pads all round now thoughā¦ Which is a trickier decision than I imaginedā¦ Iām half tempted to go with CL RC6 just to see what theyāre like, but also tempted to try PF 11 on the front PF 08 on the rear? I just have no idea, but I do know I havenāt enjoyed these Paid RS14 as much as normal (pad transfer)
Nice pictures!
Any numbers after the install of the new intake?
like these threads, i hope to go s/c next month ,so will be interesting to see the before and after power runs, as mentioned RRR were telling me 215 bhp with full system and emu on my n/a. the pull of s/c was too strong so going over to the dark side,just need to sell my kidney to pay for it
Iām back on the OEM intake right now - I need some time to put the new intake on carefullyā¦ Last time, it had a slight leak and on part-throttle you could just hear a little hissing noise, and it was awkward to start, so clearly not right. I think it was because I reused the gasket from the Corolla manifold that joins the runners to the plenum.
So right now, Iām at 210bhp (according to RRR) with a large amount of mods, cams, valves, headwork, slightly increased compression ratio, full 2bular, EMU Black, Fidanza flywheel, etc. The car goes really well both on the low and high cam now, but Iām hoping to see a little extra power released when the new intake is fitted and mapped. It might turn into a job for the Autumn when work calms down? 
Been adding a few road miles the last couple of weeks and noticed that itās starting to become awkward to change gears under hard acceleration/high revsā¦ Also, Iāve thought for a LONG time that I can hear a lot of clutch chatter/throw out bearing noiseā¦ could this be related? Any ideas of what to look at? At slower engine speeds, it changes gear cleanly.
Paging our resident gearbox expert Fonzey