Review on Autolite AR3933 4PK Performance Racing Non Resistor by Tae Madden

I recently upgraded my spark plugs to a high-performance option and was blown away by the difference it made. As a result of using this product i found that my engine was running smoother and had a noticeable increase in power .The Autolite spark plugs were easy to install and didn't require any modifications. The only downside was the price, but the quality and performance were well worth the investment. I highly recommend these spark plugs for anyone looking to enhance the performance of their engine..