(****in tight!)

But seriously bit of common sense on the back of a 1/2" ratchet should be fine

So would mine, If I didn't remind her every now and then that instead of car stuff, I could be at the pub every night pissing it up the wall instead.. Like so many guys I know do..
Yup agreed.
2AZ Exhaust manifold to exhaust system
The low torque value is because of the expansion of the joint and fixtures due to heat - too tight and it will fail. 15Nm ensures it is just snug when at room temperature.
Amazing - that post needs a thread of its own to prevent people over-tightening them.