Steeda.ca recently conducted an independant dyno test to observe the gains associated with a Kooks Custom Header installation.
The vehicle tested was a 2011 5.0L Mustang GT equipped with a Boss 302R Manifold, Steeda Cold Air Induction Kit, and a Steeda.ca/SCT Custom Tune which produced 421 RWHP and 365 RWTQ prior to the Kooks installation. After installing the Kooks Longtube Header System with High Flow Cats the vehicle tested 449 RWHP and 390 RWTQ. That's a gain of 28 RWHP and 25 RWTQ observed consistently throughout the entire power band.
The graph below illustrates the before/after test results.
The Kooks Custom Header System not only contributes to this vehicle's performance, it also produces an agressive exhaust note. (Click on dyno video below to listen!)
Kooks Custom Headers may be purchased, installed, and dyno tuned by Steeda.ca. Feel free to contact us to obtain a quote.