I have them. At the time, I was not "informed" enough to get before and after dynos.

So I can't really give you any proof of performance gains. I would defer to those people with the experience who have stated that shorty headers will provide only minor horsepower gains. From a seat of the pants perspective, I really didn't notice any difference. I can say that my K&N 77 and Flowmaster 40 with Gibson pipes provided a real kick in the pants! You might consider using the $ to upgrade your audio.

__________________
Titan CC LE 4x4 Radiant Silver * Born 4/16/04 * Big Tow / Offroad Package * Kenwood DVD/NAV ent. system * Infinity 6000cs Component Speakers * Infinity 7540A Power Amp * SPL Sub Power Amp * 2 10" PowerBass Subs * Tsunami 1-Farad Capacitor * JBA Ceramic Coated Headers * Flowmaster 40 Series Catback System * Sirius Satelite Radio * K&N 77 Series FIPK Intake System * Airaid Throttle Body Spacer * Really Loud Air Horns * Weld Racing Cheyenne Rims * Carbon fiber dash kit * Black billet grille * Truxedo Tonneau Cover * CST 7" Lift * ProComp XTerrain 35/12.5/17 Tires * Procomp Traction Bars * Stainless Steel Brake Lines
Wherever you go, there you are