All years run a dual mass. Never heard of the delay valve. Any more on that?

Spec is pointless. My new motor is (was until 2 days ago) stock, throwing 339 ft-lbs on my 2004 stock 70,000 mile clutch and I abuse the hell out of it. No need for one unless you surpass me in torque, then it's back to a 'no one knows' kind of deal.