Often used by tracks and sanctioning bodies, a Powerhouse Cubic Inch Tester tends to keep everyone honest. With a cylinder capacity of 84 cubic inches in 1/2-inch increments, our tool can measure a V8 as large as 670 cubic inches total.

It’s easy to use. First, remove the spark plug, pushrods and rocker arms from the cylinder being checked. Then, just screw in the spark plug adapter and turn the engine over by the starter. The puck assembly will indicate the amount of air (in cubic inches) in that cylinder. Multiply this figure by the number of cylinders to get your total engine size.

This kit includes a wooden case, 14mm spark plug adapter, hose, thermometer, temperature-correction factors and complete instructions.