L31MaxExpress
I'm Awesome
Just thought I would show a couple images of the later L31 GM used in the GMT800 trucks. Interestingly it has both the LS and 3 bolt mounts on the side like the 8.1L but the regular old 3 bolt bosses are not all drilled and tapped. It also has its own unique casting number. The cylinder heads also have a slightly different port shape than a regular Vortec, the combustion chamber looks to be a bit different and it has the later model 4.3L rocker arm setup on it. Has the factory GM EGR block off plate as well.
You must be registered for see images attach
You must be registered for see images attach
You must be registered for see images attach
Last edited: