The link explains what their purpose is but the general jist is that the inlet gasket helps prevent heat from the cylinder head soaking into the inlet manifold (and thus warming up your incoming air) and the exhaust plate does the same by keeping exhaust manifold temperature away from the cylinder head.
*I enquired about the 5mm gasket, but they also do a 7mm one - I can get prices on these too.
**As explained on the site, the exhaust plate is not a gasket, it is to be used in conjunction with the standard gasket to form a seal. I will also ask about the suitability of the "proper" T-Series Turbo exhaust manifold gaskets with the fire rings as it may be that the foil type is sufficient or perhaps even better suited to use with the thermal exhaust plate.
Inlet gaskets available:
A Series (combined)
K Series VVC
M Series
T Series
Exhaust plates available:
A Series (combined)
K Series
L series
M series
T series
V8
The discount applies to total number of gaskets ordered in any combination, so as I'm ordering 4 for myself I don't think it will take too much to get the 10+ rate. Please also factor in £5 P&P. If you're interested please post up a reply saying what you'd like, the "default" for an inlet will be 5mm, so please state if you want the 7mm version. Once there are 10+ I'd like to start taking a 20-25% deposit - by this I mean 20% rounded up to the nearest pound as it will be easier for me to follow
EDIT:
The 7mm gasket will be £10 more, so we're looking at £35 as we now have over 10 orders. Yes, the difference is that it's 2mm thicker
As for the exhaust plates, Mike from Ferriday has said that using the fire ringed gasket may put indents in the TEP material and so it may be better to use the foil type. My 2p worth -if you're only ever going to use the fire ring type and have more faith in it sealing, then use it. I think the issue would be that IF it was to put indents in the TEP and you then tried to use a foil gasket afterwards (because you'd disturbed the joint for some other reason) then the indents may contribute to a leak. But if you were to use a fire ring type again, the indents would be sealed with the new fire rings. Similarly, if you've never had an issue with the foil type, there should be no reason for it not to seal against the TEP in the same way that it does to the head. I'm going to check my gasket drawer and use whatever I have!
Cheers
Andy








