Finding it hard to get info on the angles that the various lowering rails put the seat on - it seems some make the seat bottom near flat which is obviously less desirable than having the front edge raised!

I need the lowered rails to fit a helmet in the car without reclining the seat so much that I can't reach the steering wheel.

Was hoping to hear input from people with experience. If you have side on pictures, or can get some, of the seat with aftermarket rails I will be very greatful!

 

I used the Buddy Club rails to lower my drivers side Recaro. I had the exact helmet hitting the roof issue and the lower rail/slider offered about a 1 inch drop. Worked perfect.

 

You mention the ability to recline so I assume we are referring to OEM Honda JDM ITR Recaros? In that case Vision ($$$) and Bride are your best options.

 

Lowest will most likely be Visions (check if ICB has any left), but they're only single locking.
Spoon made seat sliders for the stock JDM ITR seats, but I have yet to find a set.
I'm currently using Bride Type RO on mine, which lowered it about 3 cm or so. They're double-locking and solid.

Other options would be Memory Fab and Wedge.

 

Yeah JDM Recaros. I meant the angle that the seat base is on. I've heard and seen photos of the spoon rails and they sit flat which isnt good for hard braking as you can slide forward a bit.

 

vision/spoon
gen2 rails sit higher upfront better thigh support
and dual locking too