Sound Deadening
Premium ($$$): - Dynamat (USA) — Xtreme, Dynaliner (original, expensive) - Second Skin (USA) — Damplifier, Luxury Liner Pro
Value ($$): - NVX (USA) — STDX, STFX series - Noico (Estonia) — 80 mil CLD - Kilmat (China/USA) — 80 mil, Amazon popular