i spent 2.25 years working with atlas group, as assistant manager quality assurance. i left because i did not like their quality methodology...
vendor does not sell OEM silencers. or cylinders or pistons or clutches. it manufactures a fixed quantity of the part at quality standard set by AHL. and deliveres the parts to AHL.
it is now upto AHL what parts to put on bike and what parts to put on market with AHL name tag.
there is one fixed manufacturing setup. no separate production lines for AHL and market.
all that pass AHL inspection are sold to AHL. rest are segregated according to the defects on them. less defects go for more price. more defects go for less price.
fading of chrome happens due to uneven coating of chrome, poor cleaning of base metal, coating thickness too thin.