https://grassrootsmotorsports.com/articles/kenda-vezda-uhp-max-kr20a-tire-test/
Basically less grip than AD09 and Conti Sport 02, and heat soak drastically after one lap on a light miata.
Hard pass for me.
That is the thing, this isn't a collector car that sits around. I drive it at least once a week. No reason these batteries should have been having a hard time, especially if I was being diligent and putting them on a trickle charger every time I parked the car in the garage.
The AGM has had...
I've had the opposite experience. I have three LiPO4's sitting in my garage and an AGM back in the car. Got sick of the LiPO4's just randomly deciding they were done living.
AGM has been rock solid since I put it back in.
Been working well so far. I have been able to add more boost low and midrange which honestly has made the car kinda scary to drive on the street now.
One thing to note is it's much louder than the OEM HPFP.
TICK TICK TICK TICK TICK TICK TICK TICK TICK TICK TICK TICK TICK TICK TICK TICK TICK...
It's Dot 4. Just use a high quality Dot 4, like Pentosin Dot 4 LV. I actually think Pentosin is OEM.
https://www.bimmerworld.com/Brakes/Brake-Fluid/BMW-DOT4-ESL-Low-Viscosity-Brake-Fluid-81220142156-Pentosin.html