I bought the ADD Catch Can and had some issues with fitment. I attempted to install the catch can by the VERY poor directions that came with the kit. (Eye exam level fuzzy black and white pictures). In any event it appeared I needed another section of hose. I contacted David and he referred me to Jack at ADD. Referred was more like punted in my mind. Just a "We don't stock parts contact Jack @ ...." So I contact Jack, explain who I am, and what I need. Jack was very helpful tho I still think the kit itself doesn't have the correct amount of hose. Also I got a bad check valve. Jack corrected that as well as sent the hose. However, in my mind, when David replied to me via email to refer me he should have Cc... Jack and something like... Jack... can you help on this issue for my customer. He purchased the ADD W1 etc etc. SO when the computer sent me the standard "How did you like your transaction with K8Stinger" sort of thing I panned them for punting me. By just shuffling me off to ADD... K8 has no knowledge if my issue was taken care of. No knowledge if the kit they are selling in fact has insufficient parts included. David was NOT happy and rebutted the review. I fired back at him and that was that. So in my case K8Stinger won't get anymore of my money. KHARTZ and Nick are all about customer service. I would recommend them highly. I would avoid K8 Stinger gents.