From the price I am guessing the kit they are talking about is the gasket set.. This includes the metal washer to help prevent air leaks... I too was kind of disapointed in there service... They wanted me to send my engine in to replace the defective backplate... The postage cost more then the replacement backplate... Then I had to buy the gasket set to get the fix for the air leak... I have 4 Saito's and thought I was buying a to of the line engine... Like I said above, I just bought a Magnum .70 to try istead of another Saito.. It is all metal with rod bushings... I am still putting the plane together so I haven't fired it up yet... For 100 dollars less we will see...