E30 Zone

hi, i'm looking at putting poly bushes in the front bottom arms, and i've seen eccentric ones and concentric ones, and i don't know what the difference is between them. can anyone enlighten me. cheers scott.

The eccentric ones increase steering caster, making improvements to 'turn in', but do yourself a favour, and use OE E30 M3 bushes, which are vastly superior to any plastic rubbish.