My 6.1's are 2.10 intakes and have a mystery CNC job on them. The engine runs real strong to.
Are they from Tucson?
They came from a guy in Omaha, he said they came from PWR but the valve springs they had were a mystery, orange striped, and PWR didnt claim them as theirs. PWR has since went bad anyway. All I know is they had fresh Manley valves in them, bronze guides,were definitely CNC'd and I put Manley springs with some moly Comp retainers on.
