The lining in the pics above was some fancy heat mat stuff we had lying around when we first made the item - usually found shielding aeroplane exhausts!

All heat shields we supply now are plain single skin - depending on the application (ie cosmetic or 450bhp race car) the new owner may or may not want to fit extra heat matting as required.

Demon Tweeks and many of the rally companies can supply this sort of thing.

Cheers
Simon