well...... oil cooler lines dont run near the exhaust manifold, turbo lines do
just use that orange stuff with the fibreglass inside it, works wonders for high temp sheilding
they come in different sizes to suit braided turbo lines, breather hosing, wiring looms etc
ive used that stuff on breather hoses that are actually touching exhaust piping, its been about a year and its no where close to burning through
pic:
edit: sorry i just realised your still running your twin setup and i also urge you to run the standard metal lines for more reasons than 1
just make sure you use fresh copper washers, the lines have no kinks or have ever been bent
what i wrote above applys to topmounts but i guess you could put some sheilding on the steel lines too? haha