Ok I put the TR6's in so once I get the Bottle filled (if I can ever find someone with a filling station with some) I can play with my NX kit. I noticed my MPG have gone to $hit I had 3/4 tank when I put them in 13miles later it's on 1/2 tank. I have checked all the connections everything seems tight no leaks that I can see or smell. Any ideas? Is it the computer just adjusting? Also anyone else notice it feels like your pulling a boat after putting them in? Also if it is going to stay like this I'm switching back to my stock heat range. On the stock heat range plug how big a shot can I run safely?