Cold start engine noise

[2003V8LTD]

Brining this back from the dead. Did a google search for 2uzfe cold start engine knock and this thread showed up. I'm willing to give the Fuel pressure damper a try, but I see 3 different part numbers within this thread. 23270-50012, 23270-50011, and 23270-50010. 11 and 12 appear to be OEM and 10 appears to be aftermarket. Is there a different between 11 and 12. And are you guys that originally tried this and had success still no longer experiencing the knock? I have a 2007 GX470. Thanks

My V8 had two tick things on cold starts which I've now exorcised.

1. First, LOUD click and LOUD car at startup, the passenger-side exhaust manifold cracked at about the #2 cylinder. Replaced it with an OE unit. Problem solved.

2. Second, medium-loud clicking sound at startup, it was clearly coming from the fuel rail. Bought a new OEM fuel pressure damper and popped it in (super easy, just use a new crush washer). Problem solved.