Alright. Who all here is using the Thorley Tri-Y's on their 99+ 5.3 truck? Im looking for any and all input on these. Dont anybody tell me to buy Pacesetters because they are completely out of the question. Anyway, I thought there was somebody on here that had some dyno info witht he Tri-Y's but I cant remember who that was. Just feeling things out because I can get a smoking deal on them at work.