doom26464 said:
basiclly as the title says wich one should I use for my r-154?
totally depends on what temps you'll be driving in.
MT-90 is heavier than MTL.
MTL if you'll be driving in the cold. though MT-90 will work as well, just be ready for it to whine a bit when cold.
if you're not driving in the cold, heavy shockproof.