k w

have put on a 4" complete exhaust system from turbo back and i am afraid that it is going to be too loud. it's fine at idle and it's actually fine running at 70 mph (no load) but on acceleration' especially at tc lockup around 50 or so it is extremely loud. i have seen a few threads where donaldson mufflers are much quieter. any help on them or any other brand would be appreciated. if donaldson is the way to go then which one?----thanks