Straight thru does not limit flow.Id hate to have another added expense and something more to limit flow.
But it does effectively reduce the noise level at lower throttle positions. It was the only solution that worked for me without staying with OEM. Like I mentioned the 2 3/4" exhaust is going to be loder than its 2 1/2" counterpart.
Or H in my case.Not quiet at all with LTH and off road X.