I installed a new Alta IC Diverter when I changed the IC couplers the other day. One of the steps in the Alta installation instructions is to remove the plastic diverter mounted to the hood. This helps to create a larger pocket of air for the intercooler, but also leaves a gap between the scoop and the leading edge of the IC mounted diverter.  Alta closes some of that gap with a piece of trim, but a gap of more than an inch still remains. In this post, I’ll attempt to close that gap. (Sorry about the quality of the pictures.  This proved difficult to photograph — black scoop, black diverter.)

When observed from the front, a couple of things become obvious: some of the air entering the scoop misses the diverter entirely and a good quarter of the airflow hits the leading edge and presumably drops down the front of the engine rather than through the intercooler.

What’s needed is about a 1.5 inch extension to the lower edge of the scoop.  We cut some material to size, formed it to shape, and then attached it using sticky heat shielding material.

When seen from the front on the bench, you can see how much further the lower edge extends toward the IC diverter.

Once mounted on the hood, you can see how the extension lines up with the marks on the hood from the diverter.

We did some test fitting and ended up blocking the last two inches on the driver’s side to force the airflow into the IC diverter channel.  Now we just need to go for a test drive and see if it rattles at all since the heat-shield covered extension is now resting on the top edge of the IC mounted diverter.