2009-2010 Gryphon - when?

[martinoledad]

I bought it here at PHP. I dont have any dyno charts. Ive gained almost 2 MPG, i started using 91 performance but switched to 87 performance(due to gas prices), i feel that the transmission does act better since ive got my programmer and it does shift into second a little hard still but if you take off easy or give it a little gas it usally doesnt do it but i havent felt it down shift hard since ive gotten it.