Failed trunnion 2011 GS LS3
Racer
Joined: Dec 2025
Posts: 363
Likes: 41
The TSP rockers and trunnions looks good. It is a roller bearing trunnion which I prefer over the bushings. I'm running the BTR shaft rocker system which I like a lot. Is very rigid with no side to side movement.
Yes, I wrapped my Kooks with the DEI lava rock based wrap from the manifold flange down to the collectors. It does cut down on the heat a lot. I also used the DEI Hi-Temp Silicone Spray coating after wrapping as it helps to keeps any fine strands of the wrap from flaking off. I've never had any problems with heat from the headers with the starter, clutch, or fuel lines. I'm sure this is mostly because of the heat wrap but I also try to secure all lines as far from the headers as possible.
As others have recommended if you are pulling the heads and doing upgrades, I would also use the opportunity to upgrade the lifters. Link bar Johnsons would be ideal. I am running the Johnson 2110R drop in lifters myself with new geniune GM trays; I wanted to make sure the lifters were not the week point in the engine.
Yes, I wrapped my Kooks with the DEI lava rock based wrap from the manifold flange down to the collectors. It does cut down on the heat a lot. I also used the DEI Hi-Temp Silicone Spray coating after wrapping as it helps to keeps any fine strands of the wrap from flaking off. I've never had any problems with heat from the headers with the starter, clutch, or fuel lines. I'm sure this is mostly because of the heat wrap but I also try to secure all lines as far from the headers as possible.
As others have recommended if you are pulling the heads and doing upgrades, I would also use the opportunity to upgrade the lifters. Link bar Johnsons would be ideal. I am running the Johnson 2110R drop in lifters myself with new geniune GM trays; I wanted to make sure the lifters were not the week point in the engine.
Safety Car
Joined: May 2016
Posts: 4,669
Likes: 1,849
From: Erlanger, Kentucky
Install was not difficult at all. No different than almost any other trunnion kit for installing the bearings into the rocker arm housings. Installing the rockers in the car is also really not much different than installing the stock rockers. Main difference is that there are two rockers per shaft so the bolts are slowly tightened a little at a time until they are all seated together.
Just in case, I did measure to see if it would change the push rod length needed but it was exactly the same as stock.
It's a great upgrade and you get zero side to side movement of the rockers so the valve train will be much more stable.
