This set of GR5 Titanium turnbuckles are made in the USA and is a great hop-up for your shelf queen and vintage racer (including rereleases).
 
This kit includes 6 M3 turnbuckles.  2*2.6" and 4*2.75"
 
Available with optional RPM Ballcups:  https://www.dragonpunchrc.com/product-page/rpm-heavy-4-3-duty-rod-end-ball-cup-set-16-pack