I ran a lock up box on my lb7 and made over 20 passes with it all on the stock 5 speed. That was at 7100lbs also. 13.5-7s all day and she still going strong today. I wouldn't be surprised if you get some nice 12 sec times on the stock 6 speed. Best of luck!!:thumb:
Took him for a ride in my truck with the lockup box and a 13psi launch on the street in tune 4... he said, "that's violent! She's angry!!" :roflmao::woott:
So it didn't take much convincing to just throw the other lockup box on his truck. Game over! :thumb: The lockup box really seemed to help the reg cab, but we didn't get to make a pass to see how the time was effected.