16mm Pro-Built 5 Hole Fat Boys [2.2mm] Piston Set

**Jan 2024: This RC8B4.1 package includes 4 pistons, the rear bevel pistons are pre-drilled (3x1.5, 2x1.7), Fronts flats are drilled (4x1.4, 1x1.5) unless otherwise requested.**

The Schelle Fat Boys piston lineup is built around the concept that a thicker piston will limit flow around the outside forcing oil through the valving holes.  For bumpy conditions, the 2.2mm versions are milled out in the center, so the valving path is only 2.2mm tall, reducing pack for bumps but keeping the outside height tall so that the suspension won't flutter, and can pack properly on big jumps.   It gives the best of both worlds for lower grip... great bump handling while still packing up for the larger jumps.

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Hot Weather (emulsion):
Front: 42.5wt AE (550 CST) 4x1.4 & 1 x 1.5mm
Rear: 35 wt AE  (425 CST) 3 x 1.5 & 2 x 1.7mm  (for 3rd hole rear arm, use 37.5 for middle arm hole)

Cold Weather (below 70F):
Front: 40wt AE (500 CST) 4x1.4 & 1 x 1.5
Rear: 32.5wt AE  (388 CST) 3 x 1.5 & 2 x 1.7mm (for 3rd hole rear arm, use 35 for middle arm hole)

1. Precision CNC Routed Delrin (TM) pistons, sold in Pro-Built set of 4.
2. Hand marked with size on the top surface.
3. Bevel edge rear for faster rebound.
4. Reduced clearance and added Fat Boy thickness for less blow-by on landings, the result is less "flutter" in the suspension.
5. Fits electric and nitro Associated RC8B4 and RC8T4 (and older versions) and Mugen MBX8 and MBX8T series, XRAY XB9 buggy series.

Testimonial:

"I used the pistons today at the track with your recommended oils and my car was about 1/2 second faster around the track. The car was more plush with more traction. Thanks for the awesome product."    -Tim F.   (MakinTraxx RC, New York)   Conditions:  Track was dry and bumpy with a loamy outside.