** NOW SOLD** C-AHT463 Downton Cylinder head

Want to sell something? Here's the place to list it for free! (DIRECT SALES / SWAPS) No ebay links please.
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1) This section is for advertising items that you have for sale. Not for the discussion of listed items. If you wish to debate the pro's & Con's of any item listed, please start a new topic in the appropriate section.

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It would be much appreciated if sellers could leave the sale price on adverts after the item has been sold. This acts as a good measure of current value for other sellers.

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Mark S Forster
(MK1 Performance Conversions)
Rev 2.10 (06.10.20)
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Rolandino
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Joined: Sat Oct 22, 2016 11:37 pm
Location: Berkshire

** NOW SOLD** C-AHT463 Downton Cylinder head

Post by Rolandino »

I have a C-AHT463 Downton Cylinder head that I have owned since 1975. These are the modifications that I have done :

New Inlet valves C-AEG544 (lapped in)
New Exhaust valves C-AEG106 (lapped in)
New Manganese Bronze guides C-AJJ4037 (reamed) (old steel ones removed)
New double springs C-AEA 652, and C-AEA 524
New "S" Valve tops AEA653
New Bottom Collars AEA403
New Collets 88G459
Unleaded inlet and exhaust valve seats
Helicoil on thermostat housing

As its an original Downton worked on by Steve Harris when he was at Downton
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Last edited by Rolandino on Mon Mar 11, 2024 6:54 pm, edited 3 times in total.
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Rolandino
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Location: Berkshire

Re: ** FOR SALE ** C-AHT463 Downton Cylinder head

Post by Rolandino »

more pics :::
H5.jpg
rnp68
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Joined: Thu Aug 30, 2018 12:10 pm
Location: Bedfordshire, in the middle

Re: ** FOR SALE ** C-AHT463 Downton Cylinder head

Post by rnp68 »

Hi, what is the chamber cc? Regards
rnp68
Posts: 45
Joined: Thu Aug 30, 2018 12:10 pm
Location: Bedfordshire, in the middle

Re: ** FOR SALE ** C-AHT463 Downton Cylinder head

Post by rnp68 »

Just looked in the Leyland ST manual for 1275 and cooper s and it is 19cc as per the stamp on the head. Regards
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Rolandino
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Re: ** FOR SALE ** C-AHT463 Downton Cylinder head

Post by Rolandino »

Yes, I know, but after fitting unleaded seats and racing valves the chamber went up to 19.5
Skimming 5 thou would bring it down but with crap fuel, 19.5 was a better option. So if you want to buy it and skim it, it will have 19cc chambers!
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