I've found a less than good experience with their site. they say very little about their products, and if you try to post a question on the site, it may never appear or be answered with what you wanted to know. I ordered some cheap gaskets and studs, partial order filled. waited over a month for exhaust studs to arrive, which were not listed as out-of-stock when I ordered. from researching them, they have 5 employees and sublease a small warehouse. they import from China.
I also ordered an exhaust from them last year, and specs do not match their claims of "high-performance". that's why they are vague with item descriptions. They did not know the thickness of the head gasket I ordered either when I emailed about it before ordering.
The flex poopoo expansion pipe I got from them was scratchy and poor quality welds and with paint overspray.
If you know your stuff and have time, watch their YouTube videos. it's worth a laugh.
I do not recommend BikeBerry unless there is a special on a stock China replacement part you need where performance or appearance isn't important.
I give them only 3 stars