V12 header sources
#22
07-12-2022, 08:46 PM
Senior Member
#23
07-12-2022, 09:42 PM
#24
07-12-2022, 10:49 PM
Senior Member
#25
04-01-2023, 07:26 AM
Hi,
I have a 1975 XJ12C V12. I have been a motorhead for 42 years but I am new to Jag ownership. I believe that it is a good thing to improve airflow through an engine and a good set of headers generally helps if everything is set up correctly. I have been told that the stock V12 exhaust manifolds work pretty well and that headers are not worth the effort. But I am still looking around at my options. So far I have found a company in England and Australia that offer V12 headers. The Australian ones are more expensive but look to be a far better design imo. Are there any other sources to a quality made exhaust header for a V12 for my chassis that anyone can direct me to? Second question, how do I get the Australian piece to the US if I d not find any good alternatives? I have no knowledge about what the shipping options are. I checked with Fed Ex and it was a $6,300 bill. Obviously I am not doing that. DHL came in at something like $2300 but that is still pretty expensive. If I remember right shipping from England was less than $100 so I am hoping there are other options and I'd like to avoid any CA ports if possible.
TYIA
Chris
I have a 1975 XJ12C V12. I have been a motorhead for 42 years but I am new to Jag ownership. I believe that it is a good thing to improve airflow through an engine and a good set of headers generally helps if everything is set up correctly. I have been told that the stock V12 exhaust manifolds work pretty well and that headers are not worth the effort. But I am still looking around at my options. So far I have found a company in England and Australia that offer V12 headers. The Australian ones are more expensive but look to be a far better design imo. Are there any other sources to a quality made exhaust header for a V12 for my chassis that anyone can direct me to? Second question, how do I get the Australian piece to the US if I d not find any good alternatives? I have no knowledge about what the shipping options are. I checked with Fed Ex and it was a $6,300 bill. Obviously I am not doing that. DHL came in at something like $2300 but that is still pretty expensive. If I remember right shipping from England was less than $100 so I am hoping there are other options and I'd like to avoid any CA ports if possible.
TYIA
Chris
That means overheating. The radiator works by air flowing through the radiator, picking off heat and on out below the engine. If that exit is blocked off by tubing that will reach up to 1200 degree f You’ll have heating problems.
Second additional power, you will gain at most 4% more. The stock manifolds are very good indeed, plus they only weigh 4 pounds each. ( total 16 pounds).
If you want improvements polish the raw cast iron up and have them thermal coated. Silver is traditional but they also have black and red. That not only gains you a slight power increase but retains the heat to exit out the tail pipe rather than in the engine compartment.
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