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In the push for 600 rwhp, the following parts were installed at Swanson Performance in August 2008, as shown here on the engine in its current state: a Whipple 140ax, a 2.3L blower (with the large throttle body plenum option); a Whipple 3-inch blower pulley; a BilletFlow single-blade throttle body, a pair of Ford GT fuel pumps and corresponding fuel-pump driver module; 60 lb/hr fuel injectors; an SCT 90mm aluminum mass-airflow meter; and an EvenFlow Gen-2 head-cooling upgrade. A JLT ram-air intake setup also replaced the previous cold-air system that had a solid tube running to the fender, which limited horsepower to around 500. Though the ram-air doesn't have the cold-air advantage, it is able to flow more air due to less tubing and less restrictive airflow. Even with the car's stock four-cat H-pipe in place along with a pair of Flowmaster Delta 40 mufflers, the dyno drum was spun with 567 rwhp and 539 lb-ft of torque after another round of tuning. Boost levels are now around 18.5 psi with 91-octane pump gas. The stock H-pipe in place actually causes higher boost levels due to the extra backpressure from the four cats. Swapping out to a two-cat pipe will cause boost pressure to drop a bit but get the car much closer to the 600-rwhp goal.