Does anyone know what the diameter of the primary tubes are on the SH headers? How about the lenght of them? How about the diameter and the lenght of the collectors? These are VERY important to the proper design of the headers, If the design is not correct you will hear statements like[I dont think they made that much difference]or[The shorty headers work just as well] Another problem with most headers is that the primary tubes are not all the same lenght![BIG MISTAKE] There is no way a set of gutted manifolds or a set of shorty headers can even begin to compete with the power output of properly designed long tube equel lenght headers! Period.
