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Howards Cams ProMax 2618 Race Pistons
Pistons, Forged, Dome, 4.040 in. Bore, Chevy, Set of 8
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Estimated Ship Date: Dec 29, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
840412608
Part Type:
Product Line:
Summit Racing Part Number:
HRS-840412608
UPC:
840793116553
Piston Rings Included:
No
Bore (in.):
4.040 in.
Bore (mm):
102.616mm
Stroke:
3.750 in.
Engine Stroke Type:
Stroked
Rod Length:
6.000 in.
Piston Style:
Dome, with two valve reliefs
Piston Material:
Forged aluminum
Compression Height (in.):
1.125 in.
Piston Head Volume (cc):
-8.00cc
Wrist Pin Style:
Press-fit or floating
Wrist Pin Retainers Included:
No
Wrist Pin Included:
Yes
Pin Diameter (in.):
0.927 in.
Piston Ring Thickness:
1/16 in. x 1/16 in. x 3/16 in.
File Fit:
No
Gapless:
No
Remanufactured:
No
Quantity:
Sold as a set of 8.
Howards Cams ProMax 2618 Race Pistons
Howards Cams ProMax 2618 race pistons are low-silicon and stronger pistons that you need for racing! Forged from 2618 billet bar stock and then heat-treated and aged to a T61 condition, ProMax race pistons have less than one percent silicon content to stand up to the most extreme racing stress. Plus, Howard Cams' X-beam forging design produces a stronger piston than most standard pistons for the ultimate in performance. These 2618 race pistons also have the ability to keep their shape under extreme pressure and high rpm with no skirt shrinking! CNC-turned skirts, oversized valve pockets with radius valve reliefs, forced pin oilers, accumulator grooves, double Spirolox, and lock removal indents are standard features. Lightweight, heat-treated, aircraft-quality wrist pins are also included. Pump up the power of your race engine with the serious strength of American-made ProMax 2618 race pistons from Howards Cams.
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Some parts are not legal for use in California or other states with similar laws / regulations
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