Standard Corrected Power
Our testing began with what is arguably the best factory intake ever offered on an LS. Many aftermarket manufacturers have discovered that the stock LS3 intake is tough to beat. Sure, you can add power higher or lower in the rev range, but there will almost always be some sort of trade-off compared to the stock intake. Equipped with the factory LS3 intake and FAST 92mm throttle-body, the cammed 6.2L crate motor produced peak numbers of 580 hp and 527 lb-ft of torque. Naturally, all testing was run with the same air/fuel and timing values that maximized power production for each manifold. This curve was to serve as the baseline for the remainder of the LS3 intakes.