For now;) But anyway, regardless of power, its everyday driving what kills the polys. I do alot of b road driving and tbh, the rubber ones have proved the most effective. The poly's are far too stiff, same with some OEM ones. Just depends on the brand and style of driving. QH are a favourite of mine. I ran a set on my LET corsa and never had one split. Ran those for 40k miles at 250-300. First set of OEM ones I used split after 2k miles due to being too stiff. Overpacking has never been an issue either. D