It'll be quite hard to keep a turbo kit quiet since most turbo kits were designed for high performance.
High performance ususally isn't quiet. You'll need a stock or stock-like muffler like maybe a muffler off of a stock turbo vehicle.
You'll also need a stock-like Intake
and not these free flowing Intake
filters on CAI
As for the thermal insulation. Who cares if it doesn't look attractive. With the placement of our engines, you'll never notice it's there unless you get on the side of the engine bay and look deep down there.