The internals of aluminum bodied shocks should be plated, or sleeved, but if not, then they might use softer o-rings or "piston rings" really no internal metal part should come in contact with the shock body and the rest of the seals ride on the piston rod which should be plated steel and pretty bulletproof. so yes, they might need more often services, but simply because you'll loose damping over time. not due to leakage. now if you try to run them beyond their service life when leakage has occurred then you may put yourself in a position where the housing needs replacing. since you do not have a strut based car, you don't have to worry about the shock body being a rotating support of the suspension, and longer life can be expected.

In addition, we spec out the same Koni Coilovers in House that you can get from True Choice.

one nice thing, is True choice is Licensed Koni Rebuild center so they don't recommend other brands, however based on budget there are several other provider of shock that can be sourced through racing channels that are "End user" serviceable. and don't require a return to their manufacturer (or authorized shop) for rebuild.

Give me a call and we can set somthing up I can use any damper you choose. Koni, Bilstein, AFCO, Pro, etc. I don't have any loyality to a single brand, as it's all based on Performance/budget. but I like to use AFCO as a guideline, nice affordable No mystery they make all the Parts availble to the end user for rebuild and even the dampers if need replacing are only $170/each. we will have to do some calculations on where you want the car to sit. but If you are sold on koni, no problem. also I have a connection in bilstein and have allready been able to source some of the harder to find racing dampers often only found in their euro catalog.