Wiseco Professional Series Piston Kits K398X7

Overview

Brand:
Wiseco
Manufacturer’s Part Number:
K398X7
Part Type:
Pistons
Product Line:
Wiseco Professional Series Piston Kits
Summit Racing Part Number:
WIS-K398X7
UPC:
00193564072405
Piston Rings Included:
Yes
Bore (in.):
4.070 in.
Bore (mm):
103.378mm
Stroke:
3.622 in.
Rod Length:
6.098 in.
Piston Style:
Flat top, with two valve reliefs
Piston Material:
Forged aluminum
Compression Height (in.):
1.304 in.
Piston Head Volume (cc):
+3.20cc
Wrist Pin Style:
Press-fit or floating
Wrist Pin Retainers Included:
Yes
Wrist Pin Included:
Yes
Pin Diameter (in.):
0.927 in.
File Fit:
Yes
Gapless:
No
Top Ring Thickness:
1.2mm
Top Ring Material:
Steel
Top Ring Facing Material:
Gas nitrided
Second Ring Thickness:
1.2mm
Second Ring Material:
Cast iron
Second Ring Facing Material:
Phosphate coated
Oil Ring Thickness:
3.0mm
Oil Ring Material:
Chrome plated carbon steel
Oil Ring Tension:
Standard
Quantity:
Sold as a kit.
Notes:
Requires aftermarket connecting rods.

Wiseco Professional Series Piston Kits

Wiseco pulled out all of the stops with their Professional Series piston kits. These pistons accommodate the reluctor ring on stroker cranks without having to notch the pin bosses. Offset pins like OE and skirt shapes are specifically designed for street applications, making these the best piston kits available. Successfully tested in the highest horsepower applications, the Professional Series kits also utilize ArmorGlide skirt coating—which is the result of testing, development, and benchmarking through Wiseco’s in-house dyno program. The outcome is minimized friction, maximized horsepower, and improved wear resistance. Not only is ArmorGlide a high-tech lubricant that reduces friction, but it also allows the piston to be fitted tighter within the bore than a non-coated piston. Anti-detonation and pressure seal grooves give you a better ring seal, reducing noise from the piston rock and delivering better performance. Order the pistons tailored for your application.

Warranty