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Wiseco Pistons K398X7 2618 Forged Piston Kit 8-Cylinder 3.622 Stroke

(1998-2002 Chevrolet Camaro SS/Z28; 1997-2004 Chevrolet Corvette Base; 2004 Pontiac GTO; 1998-2002 Pontiac Firebird Formula)

Manufacturer

Picture for manufacturer Wiseco Pistons

Part Number

K398X7
20 reviews
Sale Price

$982.99

4 left at this price

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Wiseco K398X7 is a high-performance forged piston kit engineered from 2618 aluminum alloy specifically for demanding nitrous and turbo applications. This complete 8-cylinder kit is designed for engines with a 3.622-inch stroke and includes everything needed for installation: pistons, rings, and wrist pins (S643). The recommended ring set 4072GFX comes included, making this a comprehensive solution for serious engine builders.

Key Features:

  • 2618 aluminum alloy construction provides superior strength and heat resistance for forced induction applications
  • Precision valve pocket designs maximize flow around valves, accommodating oversized valves and high-lift camshafts
  • Optimized piston crown shapes promote efficient intake charge scavenging through cross-flow during valve overlap for increased power
  • Engineered dome geometry creates optimal quench during compression, resisting detonation and preignition for enhanced reliability
  • Precision-machined ring grooves with calculated dimensions ensure maximum ring seal while minimizing blow-by and oil consumption
  • Complex skirt profiles reduce friction while maintaining bore stability for optimal ring seal
  • ArmorGlide skirt coating reduces friction, allows tighter bore fitment, and improves wear resistance for maximum horsepower
  • Feature-aligned grain flow technology from ISO-certified forging facility ensures maximum structural integrity

Wiseco leverages decades of experience from Formula 1, IndyCar, NHRA Pro Stock, MotoGP, and AMA racing to deliver race-proven piston technology. The ArmorGlide coating not only acts as a high-tech lubricant but also permits tighter piston-to-bore clearances, reducing piston rock noise and improving ring seal for more power and longer engine life.

Products specifications

Fits

1998-2002 Chevrolet Camaro SS/Z28; 1997-2004 Chevrolet Corvette Base; 2004 Pontiac GTO; 1998-2002 Pontiac Firebird Formula

Comp Height

1.299

Comp Ratio @ 65CC

10.6:1

Comp Ratio @ 67CC

10.4:1

Comp Ratio @ 68CC

10.2:1

Comp Ratio @ 70CC

10:1

Dome Volume

-3.2

Gram Weight

488

Rod

6.098 / 6.125

Stroke

3.622

Piston Quantity

8

Rod Length

6.125

Wrist Pin Style

Floating

Make

Chevrolet

Piston Material

2618

Wrist Pin Outer Diameter

0.927

Engine

LS

Prop 65

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Bore Diameter

4.070

Compression Height

1.304

Industry

Automotive

Product Market

Domestic

Engine Type

ICE

Oil Ring Thickness

3.0

Wrist Pin Material

5115

Product Series

Professional

Product Type

Engine Piston Set

Forging Type

Strutted

Out of Stock Message

Estimated Shipped Date 3-4 Weeks

Second Compression Ring Thickness

0.047

Top Compression Ring Thickness

0.047

EBAY Category ID

33623

Engine - Web

LS

Make - Web

Chevrolet

Ring Set Included

Yes

Skirt Coating

Yes

Wrist Pin Included

Yes

Title

Wiseco - Chevrolet, LS, 4.070 in. Bore, Piston Set of 8

Piston Volume

-3.20

Title - Web

Professional Chevy LS Piston Set of 8 - 4.070 in. Bore - 1.304 .in CH, -3.20 CC

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Great service, parts, prices...

Great

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Best prices I've ever seen! I didn't install the parts yet so it's hard to comment on the quality yet.

Thank you

Quick easy checkout, part fit guaranteed

Perfect

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So far so good

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Wonderful experience with seller. Ordered on a Monday night and received on Thursday. Talking about service. Man these guys are awesome. I will be ordering more in the future with Autoplicity. Thanks again!

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