Shorty Headers

I have to respectfully disagree that shorties offer nothing over manifolds. They certainly do and it's been seen in dyno testing. Consider that manifolds don't have dividers between the cylinders. Even the coveted early 340 passenger side is nowhere near as efficient as a shorty header. Just look at the difference. Then, you have to consider the driver's side, which has basically zero dividers. Yes, shorties offer complete isolation of each exhaust port all the way the length of the tubes to the collectors. Plenty enough room for complete scavenging and zero contamination of pulled in exhaust from another cylinder. Not to mention they slam out flow manifolds. I remember Jim Laroy @IQ52 doing some testing with manifolds and he found that HP manifolds basically offer nothing over stock manifolds. I don't know if he ever did testing with shorty headers or not, but many others have and they always added to. They may not deliver the torque long tubes do, but I believe that is also somewhat combo dependent.