$204 Off

Icon Chevy 421 Forged Pistons, .218 Dome, 6.0 Rod

$204 Off

Icon Pistons

#474965

Icon Chevy 421 Forged Pistons, .218 Dome, 6.0 Rod

Specifically designed for the Chevy 421 c.i. engine with a 4.125" bore and 3.875" stroke
Features lateral gas porting on higher compression ratios
Made from high ductility 2618 aluminum alloy with a natural finish

Oversize:

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$869.62

In Stock

$1,073.61

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Product Summary

Dome Piston Style, Forged Aluminum Piston Material

Specifically designed for the Chevy 421 c.i. engine with a 4.125" bore and 3.875" stroke
Features lateral gas porting on higher compression ratios
Made from high ductility 2618 aluminum alloy with a natural finish
Available in standard or several oversize dimensions to better match your application
Piston weighs only 427 grams and the wrist pin weighs 102 grams

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Key Specs

MFG. Part #	Select Oversize
Piston Style	Dome
Piston Material	Forged Aluminum
Wrist Pin Included	Yes
Wrist Pin Style	Press-Fit or Floating

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Need To Know

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Details

Formerly KB Forged Pistons. Starting with 2618 alloy heat treated to high strength T-6 specifications, these give you the best value for your money. Exclusive V-rib adds strength without adding weight but allows maximum cooling.

High ductility 2618 alloy
Dual forced pin oiling on most applications
Lateral gas porting on higher compression ratios
Fully machined with deep valve pockets
Second land accumulator grooves
Top land mini groove technology
Diamond finished skirts
Triple wound spiral locks

For Chevy 421 c.i. (4.125" bore x 3.875" stroke). Use Style E rings (1.5mm, 1.5mm, 3.0mm).

Item Details

Piston Weight: 427 g. Rod Length: 6.0"
Bore & Stroke: 4.125 x 3.875
Ring Style: E

Charts

474-965 Instructions (PDF)

Ring Style Chart (GIF)

Guides & Documents

Pistons Installation Instructions (474965)

Pistons Technical Information (474965)

Installation Instructions (Icon Pistons)

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

CA WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

CARB warning

Specifications

KEY SPECS
MFG. Part #	Select Oversize to see
Brand	Icon Pistons
Garage Sale Type	Discontinued
Piston Style	Dome
Piston Material	Forged Aluminum
Wrist Pin Included	Yes
Wrist Pin Style	Press-Fit or Floating

GENERAL
Piston Diameter	Select Oversize to see
Dome Height	.218"
Stroke	3.875"
Connecting Rod Length	6.000"
Piston Weight	427 grams
Piston Ring Style	E
Wrist Pin Diameter	0.9270"
Wrist Pin Weight	102 grams
Top Ring Thickness	1.5 mm
Second Ring Thickness	1.5 mm
Oil Ring Thickness	3.0 mm
GTIN Code	Select Oversize to see
Sold in Quantity	Set

Ratings & Reviews

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Questions & Answers

3 Questions • 3 Answers

Sort Questions

Will these work on 18 degree heads or 23 degree only

by DD

• 4 years ago

1 answer

View Answer

Can u use a dart iron eagle 49 cc head with these pistons?

by Danny

• 9 years ago

1 answer

View Answer

what is the compression ratio with 64cc heads

by wrichard1986

• 11 years ago

1 answer

View Answer

3 of 3 questions shown