An e-mail sent to Marc just letting him know that I look forward to seeing gains from his stacks.------------------Marc I see you ran a full exhaust with your set up,. Did you do a run with stock stacks?????? Just to see the gains and where they may be????????????? My pc should be here on Friday so Saturday I will spend my time doing your R and D and will tune bike using stock stacks then will re-install your stacks with no other changes and with in a 20 minute window as to make sure things stay close. I will again tune your stacks and see where the gains or losses are and will post graphs on gix and bikeland. I will post the actual dyno runs with their A/F readings to show that both are tuned the same even if not to your liking but it will be fair to stock and yours. I hope to see increase as I wasn't able to get refund for them. But good or bad I will post for others can see for themselves and can decide if the $250.00 is worth it of if just a $70.00 filter is the way to go and put the other $250.00 into something more worth while. Should I just mail you the bill for the dyno time and R and D ? Or should I assume that it would be the same as getting a refund to ill stated claims on your products. See ya Monday!!!!!!!!!!!!!!!!!Online!!!!!!!!!!!! Dave