anybody have suggestion on what headers to use on a 305 z28? i was also wondering what the differnce is between long and short flow? any help appreciated

 

long tubes are longer and flow more, shorties are almost like the stock manifolds and you wont see much of an increase, long tubes are your best bet

 

Alih NOOOOO!!!! And you were coming along so nicely...

Long and short tube headers will both flow about the same (providing you're putting the shorties into a nice fully mandrel bent exhaust system after them), thus giving you about the same HP increase (technically the shorties are going to flow more because they're shorter, but that's beside the point...). The real benefit of a long tube is low end torque. The tubes are more "tuned" (think organ tubes) for lower frequencies because they're longer, this allows for more exhaust scavenging and thus more low end torque. There's a lot of physics and mathy stuff behind it, but I won't get into that because most people don't want to read about it. For a 305 I would recommend a long tube header with a 1 5/8" primary unless you're making boat-loads of power or you're reving the car to ~7000 rpm in which case you should go for a 1 3/4" primary.

 

[&o]