In stock form the 458 put down 450HP/316 ft-lbs of torque to the wheels.
First order of business was to build an efficient manifold which is a direct replacement for the OEM units.
We designed a header which had larger diameter primaries (1.75"/44mm compared to 1.5"/38mm) and feature a high-velocity 4-into-1 investment cast merge collector.
The sport headers save 13lbs/5.9kg over the factory units, and improve power +34HP/38 ft-lbs of torque to the wheels @ 5900RPM. Sport Headers are a direct replacement for the OEM units, and can be utilized with the OEM catalytic converters or 200 cell Sportcats. 200 cell, German imported high-flow tri-metallic sport race catalytic converters improve power by +24HP/20 ft-lbs of torque to the wheels and are a direct replacement for the OEM units.
The stock catalytic converters are a 750 CPSI, while we utilizes 200 cell OBD2 Euro level 5 catalytic converters to improve power, sound, while keeping the Check Engine Light off.
These also save 11lbs/5kg compared to the stock catalytic converters. Again these are a direct replacement and can be utilized with the stock manifolds/stock muffler or sport headers and Maxflo Muffler system.
We designed our Maxflo mufflers as a direct replacement for the large OEM mufflers with factory valves.
This 2.75"/70mm system improves on overall sound and power, picking up 8HP/5 ft-lbs of torque to the wheels. You can utilize the muffler with the OEM tri-tips, or use "458 Challenge" dual-tips which are 4.5"/115mm T304 stainless steel with Carbon Fiber background. Now that we developed a full exhaust system with tips, last order of business was to tune the ECU's with Todd Zuccone from Evolution Motorsports.
The EVOMSit program was incorporated and after proper tuning, total power improve to 518HP/368 ft-lbs of torque to the wheels.