Spitfire vs Magnum Manifold

The spitfires were a pretty good improvement over a set of 73 340 manifolds in a friends 66 Cuda. The tti headers and full 2 1/2” exhaust is even a bigger improvement over the spitfires on the same car.

Car has a 360 with kB 107 pistons and the Hemi grind cam 280/474 from mp. Dual 4 bbl, 9.5” converter and 3.23 gears. Car has been 12.5’s at the track with the spitfires open. I’m dying to see how it runs with the tti headers. It it noticbly faster just needs a time slip to prove it now.