I picked up everything I needed except the drive shaft for $800. Don't remember how much the install was. That was with 3.45 gears, so you would still need to figure in the price of the 3.91 gears and installation.
I think you should really do some research beyond price. 3.91 is a lot of gear for the V6 A6. You will have to shift to third just to get up to 70 MPH and you will be running about 2200 RPMs at 70 in sixth gear.
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New Ride -- 2015 Z06 2LZ (stock) -- Journal
Old Ride -- 2012 Camaro 2LT/RS (647 RWHP & 726 RWTQ) -- Build Thread
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