Land cruiser 70 engine mod?

[stryder22]

Hi im looking a purchasing a Land Cruiser hzj77 but it looks like this engine has been modified anyone know why that is? And does this effect the overall reliability of the engine?

 

[AussieHJCruza]

Looks like it's got headers/extractors. A very minor increase in power, no reliability concerns from an engine perspective, but the OEM manifold is less prone to exhaust leaks by virtue of having thicker flanges etc.