Intake Manifold

2005 Pontiac GTO Intake Manifold and Throttle Body - Breathing Room

When HPP was approached by Jeremy Formato at Fasterproms about increasing the power in our '05 6.0L LS2 GTO without breaking the bank, we were all ears. He suggested a mere swap to a cost-effective, hand-ported intake manifold and throttle league, accompanied by a custom tune.

The ported intake and throttle league package cost $400 when providing cores for each. There is no cite for installation and the tuning costs $400, for a total of $800. These budget mods are grand for anyone looking to unleash the power potential in their LS2-equipped Pontiac, and Jeremy and his crozier have become quite adept at it.

In spite of having a large 90mm throttle core out of the box, the LS2 intake manifold doesn't flow as well as the smaller 76mm LS6 manifold. Jeremy says this is due to the map of the plenum and disruption of airflow, but he still believes that the LS2 intake manifold has a lot of potential. He can tap into it by increasing plenum capacity, smoothing out rough edges caused by the friction-welding molding take care of, and enlarging the intake runner ports and throttle body. "There is a lot of solid inside that doesn't need to be there and has absolutely no structural prestige," he says. "By smoothing these areas out or eliminating them completely, I'm skilful to increase plenum volume and also flow." Knowing how much to take out and where is the genuine trick, and the numbers we saw from our experience tell us he has it figured out.

Source: High Performance Pontiac Magazine