in my case the engine mount wont help -- cause im trying to stop the rattle @ idle ---- everything was fine intil that damn header -- 
i have one theory im going to try --- our stock system had a bracket that bolted to the exhaust and the block -- but with the header that bracket is not there --- i bet, that is why we get the added vibration at idle ---
so i might try and reuse some how to secure the header better --- what ya think??
ps my tail pipe shakes so much cause of the header -- it rubs paint off my bumper (flame)

i have one theory im going to try --- our stock system had a bracket that bolted to the exhaust and the block -- but with the header that bracket is not there --- i bet, that is why we get the added vibration at idle ---
so i might try and reuse some how to secure the header better --- what ya think??
ps my tail pipe shakes so much cause of the header -- it rubs paint off my bumper (flame)