I have a 2.0L DOHC 4 cylinder engine, it has a cold air intake (with high-flow cone filter) as well as a header, high-flow catalytic converter, and no muffler. It is currently making 165hp and 160tq off these modifications alone.
I am wanting
Explanation of a Spark Plugs Heat Range from NGK Spark Plugs USA
www.facebook.com Reading For Air Fuel Mixture The porcelain around the plugs center electrode can be divided into three areas for reading. The ...
Well...as far as power goes...they work...... More tests will have to be done on gas mileage but they do increase power at least on my Celica GT ...