Has any body used Total Seal Gapless Rings? I was thinking of using them on my stock 1600DP. Are they worth the extra money for this application or should I just stick to normal style rings?

yes to the first question............just use new normal style.

If you need Total seal rings on a stock 1600 then your doing something wrong.

Just use the stock rings for a stock engine other wise your wasting valueable funds that could be used elsewhere.