No need to upgrade to the L-MAF. If it's the earlier 80mm version....there's really no advantage at all and you're engine can't possibly utilize the additional airflow in N/A trim that a 90mm will provide. You’ll end up with better results spending the money you save not buying the meter, on a dyno tune as an alternative. Another suggestion would be a 75mm T/B and accompanying elbow. It’s going to cost you a little more than the MAF would, at least you get some real results from it.