I purchased this to try to solve off throttle stickiness in the Holley sniper which opens all throttle blades at once. After fitting and setting up TPS to a 20% secondary opening i cant even feel the transition it is that smooth. Money well spent. The item is well made. It could be argued that Holley could have supplied at least one hairpin cotter clip to dial it in at setup and tuning stage but in my case that wasn't necessary.
Will be buying another for my second sniper as the improvement is worth more than the cost