http://www.hotrod.com/how-to/engine/1406-comparing-headers-and-manifolds/

The drop off in torque past 4000 rpm of these small outlet Magnum manifolds (the solid green line) indicates high flow was not the chief aim in their design?

The line with black squares is what Larry Shepard says is what a stock production smpi Magnum V8 makes, with the smaller outlet exhaust manifolds

HP

the line with triangles is after adding the 92 octane JTEC engine computer, RT camshaft, TriY headers by Mike Leach, MP cat back exhaust, and MP sold KN washable filter.

How to be careful when looking at the magnum engines, the kegger intake is a huge bottleneck after 4500 RPM or so.

I understand the MP replacement intake almost made it into production on SSP trucks? Some limited model.

The large opening exhaust sold quick, still have the jeep and smaller outlet units here. Can't give them away for $25 a pair.

I have a good pair of the big ones I guess I cant use....be looking for them for sale soon....BTW they did not fit with PS
Summit header tips anyone? or anyone wanna sell/donate a used set to help a brother with their wife

I cant help with the wife but I can send some good thoughts your way. I have one piggy bank left so email me when the time comes (you'll wanna go easy on a poor starving artist & fellow Moparts member)

I tried to PM you but it said you are over the limit send me a pm and we can try to get ya your manifolds