I'm gonna be the lone defender of the SP2P. When that manifold was first produced, gas in this country was in a "shortage". There were lines of cars over a mile long at some stations. I remember that, maybe some of yall are too young to. I was just a youngun and had a job as a service station attendant at one of Macon's few remaining full service stations at the time. Factoring in the cost of living, inflation and the economy, gasoline back then was way more expensive than it is now. Stations were running out of fuel left and right. That manifold was produced for one purpose. To conserve fuel. For the application that it was sold, it did it's job. In the wrong application, it completely sucks.