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Im just about to start drilling into my Rev 3 manifold as well so will be good to discuss the best place.
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From the position youve marked there will you not have some difficulty accessing the jets due to the fuel rail and all the harness/pipework that runs around that area?
I was planning to mount the injectors on the other side, so they can be accessed from under the car.
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Id like to figure out the best place to mount them in terms of how high up the runners and where theres enough metal to tap a good secure thread
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I PMd Bob to ask his advice and he said that on top of the manifold would be better but not much room there so on the bottom may be the best place as you will be able to get them from the bottom of the car.
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And that he fits them down as close to the head as he can.
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