For those that don’t know, ZEAL is Endless’ labelmate. Endless is brakes, ZEAL is coilovers, simply put. Same company. ZEAL is known to be in the upper echelon of coilover suspension systems. All monotube from street to circuit versions. We perform overhauling in-house for the North American market and take it quite seriously. ZEAL coilovers have come a long way. It’s the little things that count. For instance, here we have an older Function-Xs on the left and a newer version on the right.
First, notice the upgrade from a thinner lock seat (for the lower adjustable cup/bracket) and stainless seat on the left, to a wider lock seat on the right. Also notice the difference in color of the shell case. Our older versions (ie., Function-B6, Function-V6, etc.) were completely silver. Now they have a goldish color. This gold colored coating helps protect the exterior against rusting.
Little ever evolving changes like this, go a long way.
Notice we’re pointing at the protrusion. This is actually the bottom of the seat and it aids in securing the lock seat to the bracket.
From left to right, we have a rum cylinder (reverse monotube-type), an older shell case, and a newer shell case.
Here is the inside of an older shell case.
Here’s the inside of an updated shell casing for a reverse monotube type ZEAL coilover. The rum cylinder goes inside here. The ring as well as the protrusion below help secure the cylinder causing less noise and unnecessary friction. ZEAL continues to progress.