Thats the primary reason (cooling). As long as you keep the original wall and just cut away some small areas to allow it to drain to the centre pickup area it's fine.
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Thats the primary reason (cooling). As long as you keep the original wall and just cut away some small areas to allow it to drain to the centre pickup area it's fine.
As my 202 now needs a head gasket, im looking at putting a reco yella terra head on the thing so naturally will be looking for extractors and a few breathing upgrades to make it worth while.
Obviously 202s came in kingswoods as well as commodores and toranas, would all the extractors be the same? or will they be model specific?
As my landy already has a 202 in it I will assume that the header that are on there would be standard issue holden?
Some later model engines had more ports so you need to make sure the header matches the number of ports or at least are designed to interface directly with the change in port design wothout steps and obstructions.
The YT head will be a 12 port design and will be optimised for size. Depending on the source of the headers/extractors you'll need to match port them to some extent.