Im pulling my hair out! Seems like every time I talk to someone I get a different answer. One person says get a Limit eng. turbo, then the next person says get a PTE turbo, then I've read that PTE had reliability problems. Almost every one i talk tells me a different size. I've narrowed it down to TE60, TE61. PT51. PT52. I'd just like to get my GN to run low 11's. And what about a .63 ext. housing. On mafs 3" or 3 1/2". And what scan tool? Scanmaster seems to be what everyone is using. Please HELP! You guys are the EXPERTS. I've been reading these Q&A's and that is how I chose the upgrades I've already made. THANKS IN ADVANCE. TAREY D.