Spring for chain tensioner Simplex
for all 2 valve boxer models after september 1978
Compare 11311335584 / 11-31-1-335-584
Spring for chain tensioner Duplex
for all /5, /6, /7...
Piston for chain tensioner Simplex
for all 2 valve...
Chain tensioner Duplex
for all /5, /6, /7 models until...