Firewall insulation plus sound deadening pad

[RAVano]

Is there any benefit on putting a layer of Dynamat, Fatmat, etc on the firewall before installing a new firewall insulation and AC/heater box?

 

[Mike69cuda]

That is what I did on mine. I think it helps isolate the engine noise and heat. Mine is an a/c car and the factory insulation is kind of sparse.

 

[1969383S]

Is there any benefit on putting a layer of Dynamat, Fatmat, etc on the firewall before installing a new firewall insulation and heater box?

Unless your going for a points resto it totally makes sense. Thin would be good so if using the factory insulation as well there will be no real fit issues.

 

[RAVano]

Thanks for the insight I'll add a layer before the install.