[sleepydsm]

Rolled ends make the product appear higher quality. Think about it. Yes, it is just an intake tube. But do you want to cut corners (it's more preference in this case) and make a "shitty part" or make something that is actually better than the competion? Give people a reason to keep coming back, to tell their friends, to ask for more stuff to be made. And if it means raising the price a tiny bit, it still may be worthwhile.