My brother just bought a 2008 RCSB with a 4.8, it has a Gibson Cat-back, 3:73s, and a CAI. Its on a stock tune and I told him that the torque management is killing it down low. Question I have is what do you guys think it will run the way it is vs a tune in the quarter? What times is he looking at?

 

stock 15.9-16.3s
tuned 15.3-15.7s

 

my std cab long bed with tune and exhaust went 15.5, with headers and an all out tune on the trans it went 15.1 at 90.5mph