The Stovebolt Site Forums The Parking Lot Big Bolts GMC Big 6 Aftermarket Manifold

Thanks for the responses. Crenwelge, tell me more about your GMC. What engine did it have? How many RPM were you running? My 503 is rated for 181HP at 2800 RPM. I understand the loss of low RPM power but its a fire engine so you're trying to be quick

Has anyone run a manifold like this with the stock exhaust manifold?

WetWilly, here are a couple pictures of the truck:

Now:

http://s1061.photobucket.com/user/abhadurihauck/media/IMG_0127_zpsbba7f0aa.jpg.html?sort=3&o=10

When almost new:

http://s1061.photobucket.com/user/abhadurihauck/media/Engine23_zps9def5d21.jpeg.html?sort=3&o=3