
Piston Tuning Set, Pro-Built Fat Boys 5 Hole (4 Pair) - Schelle Racing Innovations
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30-day returns · Secure checkout by Stripe · We accept Visa, Mastercard, American Express, Discover, Apple Pay, Google Pay and Link

Pro-Built tuning set: 8 Fat Boys pistons, 4 at 2.2mm and 4 at 2.7mm. Fronts are 5x1.4 and rears are 5x1.5mm. Nothing is pre-drilled, so it's yours to tune. Team Associated drivers favor the thinner 2.2s for low grip and bumps, and the 2.7s for more pack on smooth tracks. Mix and match for your surface. All pistons are flat front, bevel rear. Precision CNC routed Delrin, sold in Pro-Built sets of 4, hand marked with hole diameters. Reduced clearance cuts blow-by on landings for less flutter. HOT WEATHER: Front: 42.5wt AE, 4x1.4 & 1x1.5 Rear: 35wt AE, 3x1.50 & 2x1.70mm (3rd hole, wide RC8B4.1 arm) COLD WEATHER (below 60F): Front: 40wt AE (500 CST), 4x1.4 & 1x1.5 Rear: 32.5wt AE (500 CST), 3x1.50 & 2x1.70mm (3rd hole, wide RC8B4.1 arm) FITS: Electric and nitro Associated RC8B4.1, RC8T4 (and older) Mugen MBX8 and MBX8T series XRAY XB9 buggy series Good to tune a nitro and an e-buggy!











