Scooby SL

How long a length of heat wrap do you need to wrap a decat down pipe on a WRX.
Found top quality stuff at work approx 4mm thick 50mm wide very flexable should wrap around easily.
Huge long roll but better leave some here
Thanks

swisstonihasher

Cant remember length I used but to be honest I ended up buying loads more - got tube headers, up-pipe, downpipe all rap up sweet.