Unfortunately the 7M engines don't have much in the way of aftermarket intakes, unlike all the variations of say a chevy 350. You can buy better tubing that feeds the intake for a turbo, along with a better intercooler and a better filter, but as for the intake itself you are not going to find much out there and if you do it will entail much modifying and expense.
Now you can port and polish the intake system and match all the intake and exhaust ports which will help some. You can also go with a mm larger intake and exhaust valve for a little better flow. I have said before that I personally feel that a set of 3 Weber's and intake would really wake this engine up, but I have never seen one.
So good luck
Russ
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