3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.3"
3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.3"
3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.3"
3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.3"
3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.3"
3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.3"
3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.3"
3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.3"
Load image into Gallery viewer, 3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.3"
Load image into Gallery viewer, 3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.3"
Load image into Gallery viewer, 3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.3"
Load image into Gallery viewer, 3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.3"
Load image into Gallery viewer, 3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.3"
Load image into Gallery viewer, 3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.3"
Load image into Gallery viewer, 3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.3"
Load image into Gallery viewer, 3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.3"

PART #: 1-3400-4040C

3400-4040 393W - 5.8 Stroker Small Block Ford 351W FX Series -4cc Flat Top SBF 20 Degree Inline Forged Piston Set 4.040 inch bore Pin Dia.: 0.927" Comp Height: 1.3"

$669.95
$669.95
Sale Sold out
/
Piston Series Option:
Piston Ring Kit Option:
Ships in 1 - 8 days

Ships in 1 - 8 days

Made in the USA

Made in the USA

Secure Payment

Secure Payment

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

395 Small Block Ford 351W, FX, Comp Height: 1.3, -4cc Flat Top , PIN: .927", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.850", ROD: 6.25, Approx Comp Ratio: 58cc-12.48, 64cc-11.6, 70cc-10.82


Piston Top Aprox. Comp. Ratio:

-4cc Flat Top SBF 20 Degree Inline
ChamberComp Ratio
5812.48 to 1
6411.6 to 1
7010.82 to 1

For accurate Comp Ratio info use the calculator below.

Engine Brand: Ford

Engine Family: Small Block Ford 351W

Engine Size: 393W - 5.8 Stroker

Cylinder Bore Size: 4.040 in , 102.535 mm

Ring Groove Width: 1.2/1.2/3MM

Compression Height: 1.300"

Pin Diameter: 0.927"

Connecting Rod Length: 6.250"

Crankshaft Stroke: 3.850"

Cylinder Head: SBF 20 Degree Inline

TDC Assembly Height: 9.475" ( 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:

-4cc Flat Top SBF 20 Degree Inline
ChamberComp Ratio
5812.48 to 1
6411.6 to 1
7010.82 to 1

For accurate Comp Ratio info use the calculator below.

Engine Brand: Ford

Engine Family: Small Block Ford 351W

Engine Size: 393W - 5.8 Stroker

Cylinder Bore Size: 4.040 in , 102.535 mm

Ring Groove Width: 1.2/1.2/3MM

Compression Height: 1.300"

Pin Diameter: 0.927"

Connecting Rod Length: 6.250"

Crankshaft Stroke: 3.850"

Cylinder Head: SBF 20 Degree Inline

TDC Assembly Height: 9.475" ( 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