Load image into Gallery viewer, 1-2705-4030  408 Small Block Chevy 1-FX Series -21cc Dish Top  Forged Piston Set. 4.030 bore
Load image into Gallery viewer, DISCONTINUED USE 1-2475-4030  408 Small Block Chevy 1-FX Series -21cc Dish Top  Forged Piston Set. 4.030 bore
Load image into Gallery viewer, DISCONTINUED USE 1-2475-4030  408 Small Block Chevy 1-FX Series -21cc Dish Top  Forged Piston Set. 4.030 bore

PART #: 1-2705-4030

DISCONTINUED USE 1-2475-4030 408 Small Block Chevy 1-FX Series -21cc Dish Top Forged Piston Set. 4.030 bore

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Made in the USA

Made in the USA

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This is a pre order item. We will ship it when it comes in stock.

408 Small Block Chevy 1-FX Series 4032 Alloy Comp Hgt: 1.000" -21cc Dish Top Pin: .927 Ring Grooves: 1.2/1.2/3MM Stroke: 4.000" Rod: 6.000" Boost and NOS Ready! (Moderate to High Levels) Aprox Comp Ratio: 58cc-10.57, 64cc-9.95, 70cc-9.41

Piston Top Aprox. Comp. Ratio:

-21cc Dish Top
ChamberComp. Ratio
58cc10.57 to 1
64cc9.95 to 1
70cc9.41 to 1

For accurate Comp Ratio info use the calculator below.

Engine Brand: Chevy

Engine Family: Small Block Chevy

Engine Size: 408

Cylinder Bore Size: 4.030 in - 102.28 mm

Ring Groove Width: 1.2/1.2/3MM

Compression Height: 1.000"

Pin Diameter: .927

Connecting Rod Length: 6.000"

Crankshaft Stroke: 4.000"

Cylinder Head: SBC 23 Degree

TDC Assembly Height: 9.000 ( Zero Deck Height )

Download Piston Instructions

 
Features: Piston Series
 

E series

 SX series  1-FX series  2-FX series  3-FX series
Broached pin oiling slots

x

x

 

 

 

Drilled, forced wrist pin oiling

 

x

x

x

x

Forged drain-back windows

x

 

 

 

 

Drilled bottom ring land intersecting oil groove drain-backs

 

x

x

x

x

Slightly larger, deeper valve reliefs than OEM

x

 

 

 

 

CNC machined valve reliefs for moderate performance heads and cam combinations

 

x

Larger, deeper CNC valve reliefs for more aggressive cylinder head and cam combinations

 

 

x

x

x

Premium Aircraft spec. 4032 low expansion alloy

x

x

x

 

 

Premium Aircraft spec. 2618 alloy

 

 

 

x

x

Blower, Turbo, NOS ready

 

x

x

x

x

Brushed piston crown

 

 

x

x

x

Turned dishs

x

x

 

 

 

Max Quench milled dishs

 

 

x

x

x

Additional CNC milling for weight reduction in non-critical areas

 

 

x

x

x

Patented “X Groove” skirt for superior cylinder and ring life

 

 

x

x

x

Thinner/shallower Ring grooves for maximum ring seal and land strength

 

 

x

x

x

Low volume contact reduction grooves    

x

x

x

2nd ring land accumulator groove prevents ring flutter    

x

x

x

3rd ring land scraper relief    

x

x

x

Oil ring groove relief reservoir    

x

x

x

Inner and outer pin boss weight reduction radiusing    

x

x

x

Tighter control of crown thickness yields consistently lighter parts    

x

x

x

Dynamic skirt milling controls skirt thickness for consistently lighter parts  

 

x

x

x

Diamond-turned high strength skirts

x

x

x

x

x

High-strength piston pins

x

x

x

x

x

Extreme Duty XR wrist pins      

 

x

Horizontal Gas Ports enhance ring seal        

x

Forged and machined in the USA

x

x

x

x

x

Piston Specs

Piston Top Aprox. Comp. Ratio:

-21cc Dish Top
ChamberComp. Ratio
58cc10.57 to 1
64cc9.95 to 1
70cc9.41 to 1

For accurate Comp Ratio info use the calculator below.

Engine Brand: Chevy

Engine Family: Small Block Chevy

Engine Size: 408

Cylinder Bore Size: 4.030 in - 102.28 mm

Ring Groove Width: 1.2/1.2/3MM

Compression Height: 1.000"

Pin Diameter: .927

Connecting Rod Length: 6.000"

Crankshaft Stroke: 4.000"

Cylinder Head: SBC 23 Degree

TDC Assembly Height: 9.000 ( Zero Deck Height )

Download Piston Instructions

Piston Series Comparison Chart
 
Features: Piston Series
 

E series

 SX series  1-FX series  2-FX series  3-FX series
Broached pin oiling slots

x

x

 

 

 

Drilled, forced wrist pin oiling

 

x

x

x

x

Forged drain-back windows

x

 

 

 

 

Drilled bottom ring land intersecting oil groove drain-backs

 

x

x

x

x

Slightly larger, deeper valve reliefs than OEM

x

 

 

 

 

CNC machined valve reliefs for moderate performance heads and cam combinations

 

x

Larger, deeper CNC valve reliefs for more aggressive cylinder head and cam combinations

 

 

x

x

x

Premium Aircraft spec. 4032 low expansion alloy

x

x

x

 

 

Premium Aircraft spec. 2618 alloy

 

 

 

x

x

Blower, Turbo, NOS ready

 

x

x

x

x

Brushed piston crown

 

 

x

x

x

Turned dishs

x

x

 

 

 

Max Quench milled dishs

 

 

x

x

x

Additional CNC milling for weight reduction in non-critical areas

 

 

x

x

x

Patented “X Groove” skirt for superior cylinder and ring life

 

 

x

x

x

Thinner/shallower Ring grooves for maximum ring seal and land strength

 

 

x

x

x

Low volume contact reduction grooves    

x

x

x

2nd ring land accumulator groove prevents ring flutter    

x

x

x

3rd ring land scraper relief    

x

x

x

Oil ring groove relief reservoir    

x

x

x

Inner and outer pin boss weight reduction radiusing    

x

x

x

Tighter control of crown thickness yields consistently lighter parts    

x

x

x

Dynamic skirt milling controls skirt thickness for consistently lighter parts  

 

x

x

x

Diamond-turned high strength skirts

x

x

x

x

x

High-strength piston pins

x

x

x

x

x

Extreme Duty XR wrist pins      

 

x

Horizontal Gas Ports enhance ring seal        

x

Forged and machined in the USA

x

x

x

x

x

Engine Power TV

The DSS FX, X-Groove Feature