Manifold End Rail Spacers Part Number:300-300 (BBC Dart/Brodix 20º Heads - 1/2" Thick Top 1 Pair) We found one as it

We found one as it sealed the engine quickly

Valvetrain stabilizers are a must have when using any aluminum cylinder head or iron cylinder heads running high Rpm’s

This ram-air effect increases the air and fuel entering the cylinders and provides a substantial increase in torque and horsepower

which can inhibit optimum performance or cause severe engine damage

Manifold End Rail Spacers Part Number:300-300 (BBC Dart/Brodix 20º Heads - 1/2" Thick Top 1 Pair) We found one as itReher Morrison's intake manifold end rail spacers are CNC machined from 6061 T6 aluminum. These spacers fill the gap between the bottom of the intake manifold and the top of the lifter valley at the front and rear of the block. (This area of the lifter valley is sometimes referred to as the "china wall".) This gap can be quite large due to: Installing certain cylinder heads (i. e. Dart or Brodix 20, etc.), installing a standard manifold on a tall deck