I have found alot of sites that sell aftermarket Velocity Stacks for my 08. They range from $250 to $350. Then I called the closest dealership and priced the stock ones for cylinders 1 and 4. He told me they have to be differant in some way because there are 2 differant part numbers. From the pic he said that it looked like the screw holes were in differant places. But that they were $8.70 each. Does any one know if they will work on cylinders 2 and 3? All the throttle bodies are the same size. I am just wondering about the screw holes. It would save me ALOT of money.