STOCK 318 roller cam vs non roller LA

The reason mopar and others went roller was due to the fact that additives were being taken out of oil, zinc, phosphorus, molybdenum, etc because these chemicals ended up destroying catalytic converters when small amounts of oil burn.

The roller cam is a great choice and has many benefits. Compared to a flat tappet hydraulic, there isn’t really much change in power you’d actually feel.