Not sure about HTA splitters, ROAR recently brought one for his cassic, it was thin and full of air bubbles when he got it, he put a lot of work into it to make it look good but it still didn't fit well, then he just scrapped a drop kerb and it shattered, So thats 4 of you now whose done splitters, hope its not catching.
I'd reccommend jdl for splitters, i ripped mine off last year and run over it and it only needed a little bit of cosmetic work before it went back on