Regarding the reliability of LETs 181mm and 185mm pulleys...there are only 3 issues to date im aware of.

The most common is the water pump pulley failure. From day one i though the included water pump pulley was too thin, and sure enough they broke. However, the new version pulley is very thick and i do not forsee this happening again.

The second issue (which i persoanlly encountered) is the 6 crank pulley bolts that hold the outer aluminum ring to the steel hub backing out. The fix...remove and reinstall with red locktite.

The third issue i have only seen from Waldig. The hub was too long and had to be machined down. To my best knowledge thats an isolated incident.

Regarding 1/4mi et's, i have not seen anyone with a code 3 pulley and any other combination of mods(minus nitrous or water/meth) run faster than BLKFIN's 12.2. My personal 1/4mi mph is rediculously low due to my lack of fuel and retarted timing up top, so i wouldnt use that as a good comparison.