Unless otherwise stated, we will put the quality of the parts we sell up against any other companies' in the industry. Also, we stock the same parts from different manufacturers so that when back orders occur like they have been for the last year we have an alternate part to send that is the same quality. This would be the ONLY reason your order might be slightly different when it arrives. You can return part or all of your order. All claims for orders sent incorrect, incomplete, or damaged should be made right away by contacting us.99% of problems can be easily solved without returning the entire order. Over 99% of people in the world are not qualified to work on an engine, and we ALWAYS STRONGLY recommend parts be installed by a qualified, experienced mechanic. Also, we want information from customers when their experience is less than desirable so we know what areas need improvement the most. Please work with us and we will ALWAYS work with you.