How much boost are you planning? I'v never run Vibrant cats but I've been running a ProCharger at 8.9 psi for many years and around 130,000 miles with BBK LTs and high flow cats. I haven't had any problems with the LTs or the mid-pipe. I don't have any idea why people are saying you have to go catless. It isn't true.
STD corrected I'm very close to 400 rwhp. Assuming a 15% loss through the drive train the SAE corrected 388 rwhp becomes 450 bhp. I don't think you will have any problem achieving your goal with the exhaust you have.
P.S. All my mods are in my garage.
ProCharger P-1SC, 9 psi, STD 396/383; Uncorrected 388/375; SAE 383/370.
USAF 1969-1973,1980-1996: Vietnam veteran. Aircraft maintenance. R & D, ICBM Operations.
Also own: 1997 Harley FXDWG, 1998 F-150, and 2002 Corvette LS1
Last edited by Eagle2000GT; June 13th, 2019 at 04:18 PM.