The original material used by TVR for the tunnel acoustics was a bad design and often perforates holding water (Often referred to as the squidgy bags!).
We have replaced this with a 3 part composite construction which is good for temperature up to 380 celsius.
This consists of an inner woven fibre blanket for acoustic damping, a reflective outer surface and a heat resistant backing.
This is a 3 part kit and also includes the high temperature adhesive.
If you cannot find the part your looking for, visit the contact page.