TREPerformance

By showing the results of more than one vehicle with a good combination of bolt-ons, you can see that this product offers a nice benefit for both modified and nearly stock setups. Realistically, the installation of this plenum and 75mm throttle body on very mildly modified vehicles will add at least 8 rear wheel horsepower, and it is possible to receive as much as 11-15 rear wheel horsepower and up to 20 ft/lb of torque on more heavily modified vehicles with a good combination of bolt-ons. Supercharged vehicles can expect even bigger gains, where improvements of between 15-25 HP should not be uncommon.

Something that cannot be stressed enough is that the performance of this product is STRONGLY dependent upon which throttle body is used. Although most people will commonly feel that a 75mm throttle body is overkill on a naturally aspirated 4.6L engine, our dyno testing, and the dyno testing of many others has proven otherwise. Prior to the release of this new plenum, even a 70mm throttle body was quite useless when using the factory upper intake plenum. In order to illustrate the differences in performance that can be seen using different throttle bodies, we have added a specific page dedicated to showing actual dyno comparisons of the most popular aftermarket throttle bodies, including a new 75mm unit from Accufab. From the beginning, we have stated that the 75mm throttle body generates the most horsepower when used with our new plenum. Put simply, the size and flow entry design of the throttle body determines the maximum airflow of the plenum, and therefore the maximum performance that can be achieved.