Halfway down their length, the primary tubes step up from 1 7/8″ in diameter to 2″. The step helps reduce reversion and gives a broader powerband.
The ASP header features a merged collector and a megaphone with a reverse cone. The megaphone gives a broader powerband and the reverse cone helps reduce the power fall off past the power peak.
A merged collector smoothly blends all the primaries together. It not only flows better for more peak power but also acts as an extension of the primary tubes, giving a broader powerband and more top end together. A merged collector works way better than the traditional box collector.
At the end of the megaphone is a V-Band for easy attachment to your exhaust system. Overall the ASP header has all of the features of a custom super expensive race header for a reasonable price.
For engine management, we turned to Hondata for their K-Pro ECU. The K-Pro is a 2002-2004 OEM ECU from a RSX Type S manual transmission with a K20A2 engine that has been modified by Hondata to be user-programmable. For a 2005-2006 RSX like our car, an adaptor harness needs to be used but the ECU will bolt into the stock location. The K-Pro is fully user programmable and it also data logs what the stock sensors are doing.
Stay tuned as we assemble our all-around killer K24/K20 hybrid and drop it into our restored RSX!