1) stock for 3.8 k060663 http://www.oreillyauto.com/site/c/de...eyword=k060663
2) smaller for 3.5 k060660 Gates® Micro-V AT® K060660 - OEM Quality Serpentine Belt | O'Reilly Auto Parts
3) smaller yet for 3.5 k060658 Gates® Micro-V AT® K060658 - OEM Quality Serpentine Belt | O'Reilly Auto Parts
I went with #2 at first,5 years ago and just recently switched to a #3 size in a Goodyear. That belt you have, being a k060841, would be too big.
Picture of old 658, I keep them because they make an excellent strap wrench
