headers for a 318

The other option is the 340/360 manifold combination. You'll get the same exhaust flow that came on the 340 6Pack engines. These manifolds cost a lot less than headers, they do not leak or scrape over speed bumps and they are very easy to install (very much like the stock 318 manifolds) but they flow much, much better.
In the first pic you can see the difference in the exit hole size between a regular 318 exhaust manifold and a 340/360 magnum manifold.

You can spend a bundle on headers but you'll only see significant gains in power at higher RPMs (4500 and up). However if you're the type of person that likes headers then that's the way to go!!!:burnout:

treblig