Some automobile manufacturers have recently developed a leaf spring that is constructed of a composite material similar to plastic in order to provide a softer type of rear suspension.
Flight time from New York to Reykjavik is 5 hours 30 minutes. Non-Stop flight duration from JFK to KEF is 5 hours 30 minutes (Operated by JetBlue Airways).
Is there any reason you are going counter clockwise? I went back in July and went from Reykjavik (2 day) to Akureyri (3 days) and that took about 8 hours. Then we went from Akureyri to Neskaurpstadhur (1 night) - took about 7 hours. Then from Neskaurpstadhur to Hofn (2 day) which took 5 hours. Hofn to Vik (1 night) and that took less then 4 hours. Vik to Reykjavik took about 4 hours. Please keep in mind that we stopped off to see things during the drives.