Yes that’s long. But that’s not gonna be your problem. I’ve seen many set up on cars where the turbo is center mounted in the grill, and yet the gates are mounted right off the headers at the first bend and not have creep issues.
What is more then likely the issue is how the gate port is blended in to the housing it’s self.
If you take the turbo off and look down the opening of the hosing the wastegate port is more then likely at a hard 90* in to the housing. If you take a die grinder, and blend the top of the wastegate port up like, almost like a tear drop it will help make that turn closer to a 45* then a hard 90*.
The old mitsu turbos always had this issue, and porting the housing like I said, along with a bigger gate flapper always cured the issue. It’s also worth mentioning that if you moved the gate to where that firt butt weld is, it would be exactly where the gates use to be when RCC use to use the old style 5 bolt exhaust housings like what you have. But they also ported the housings like I just said.
There’s also some other things to check. Make sure the line going to the waste gate is the proper size. Many times guys will stretch a smaller hose on the fitting. Almost make sure the line is away from the header and has no burns or melted spots in it. I don’t see “Tial” on the hat of the wastegate. The knock off China gates are prone to crappy manufacturing defects. Pull the gate off, and pill the spring. Move the valve in the gate by hand. It should move easily throughout the whole stroke. The more common issue is a hole in the diaphragm allowing boost to bleed off through the top port and will cause creep.
I’ll atep off my soap box now.