Geez...really hate to hear these issues with NRW VCs.
I was an early adapter on release, and frequently communicated with one of the owners [Neil] prior to purchase.
NRW VCs + grommets +
100% new 'everything' with install at performance shop resulting in zero fitment problems along with to-date +10K mls use.
Issue types described likely stem from machining and/or supplier changes along with sub optimal quality measures/sampling.
Curious, anyone reach out and provide NRW with these findings?
If so, their response(s)?
NRW parts installed: VC's in 'OE gray' + in-line fuel filter