Are the manifolds considered a warrantable item? I agree, this seems a bit ridiculous.For sure. The last cyl on each side has a fairly large gap between fasteners. Once the furthest neck bolt fatigues enough and brakes of the manifold warps and you get the dreaded whistle.
I'm at be 60k and replaced both sides at this point.
1st at 38k and the second at 45k.
Sent from my Pixel 2 XL using Tapatalk
I'm curious as to whether the root cause is a) the manifold warping excessively, causing the bolt to shear and allowing it warp further, or b) the OEM bolts are just crap material, breaking due to stress under normal manifold expansion cycles.
Just a thought: could something as simple as replacing the OEMs with ARP's prevent the issue?