This is a set of full-length and correctly angled jet exhaust tailpipes for the A-6 Intruder family (A-6A, A-6E, A-6E TRAM Intruder, EA-6A).
It contains detailed, thin-edged nozzles as well as detailed J-52 engine end with guide vanes and probes.
The set is designed for the HobbyBoss Intruder kits (and the instructions are explicitly guiding how to fit it into those kits), but may fit other A-6 kits as well.
It is not suitable for EA-6B Prowlers as the nozzle is slightly different. By Hypersonic Models