I have an aluminum block 4.6L DOHC. I want to do a custom hidden twinturbo set-up, I was wondering if the Mach 1 Ram Air intake outflowed the NA 99 Cobra intake? I really like the shaker and ram air that the Mach 1 motor does. Or should I go aftermarket if I can find one (Don't know of one for the DOHC motor)? I'm looking to spend about $6k - $8k on the motor plus tuning. I already have turbos.