ok I just bought my 90 4runner and i like it I have a 4inch lift but it has 33s on it and it seems as though it is really slugish what do you think if i went to 31s or any other ideas to maybe boost some power? I will be changing the exhaust to 2.25 and a putting a high flow cat and muffler it already has a K&N air filter. Any help would be great thanks