[ppsi]

Hello-my E350 is way loud inside the cab. It is a 96 and I have replaced the sound deadening material on the engine side of the doghouse with a heavier duty double layer material and this has helped but it is still rediculously loud inside the van. Can anyone give some recommendations on what steps to take. I understand the majority of the sound comes from the injection design so maybe wrapping the valve covers would help but I don't know what would be a good material. Would wrapping the exhaust & turbo-w-"header" wrap help?