Bigger is always better, right? Five-inch bore space motors have been becoming extremely popular in Pro Mod racing the last few years as companies push new parts for these mountain motors.  One of those companies that is contributing their expertise is JE Pistons.  The 5-inch bore space pistons come in 5.000 and 5.300 bore configurations, and can be fully customizable depending on valve relief and compression ratio needs.

The pistons are a true, full round-style forging and can be drilled for either vertical or lateral gas ports.  Also for the wrist pin you can opt for button or traditional wire locks.  Finally, nitrous piston users can benefit from JE’s smooth finished crown option that softens any potential sharp edges.

• Fully custom made piston from a full, round-style forging
• 5.000 and 5.300 bore space
• Vertical or lateral gas ports
• Smooth finished crown eliminates sharp edges
• Virtually any compression ratio or piston valve reliefs can be built