6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.22"
6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.22"
6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.22"
6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.22"
6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.22"
6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.22"
6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.22"
6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.22"
Load image into Gallery viewer, 6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.22"
Load image into Gallery viewer, 6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.22"
Load image into Gallery viewer, 6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.22"
Load image into Gallery viewer, 6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.22"
Load image into Gallery viewer, 6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.22"
Load image into Gallery viewer, 6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.22"
Load image into Gallery viewer, 6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.22"
Load image into Gallery viewer, 6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore COMP HEIGHT: 1.22"

PART #: 1-6485-4040

6485-4040 506 Mopar Viper/SRT FX Series -25cc Dish Top No Notch Mopar Viper/SRT Forged Piston Set 4.040 inch bore Pin Dia.: 0.927" Comp Height: 1.22"

$1,379.95
$1,379.95
Sale Sold out
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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.

508 Mopar Viper/SRT, FX, Comp Height: 1.22, -25cc Dish Top No Notch, PIN: .927", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.960", ROD: 6.242, Approx Comp Ratio: 64cc-9.55, 74cc-8.76, 84cc-8.09


Piston Top Aprox. Comp. Ratio:

-25cc Dish Top No Notch Mopar Viper/SRT
ChamberComp Ratio
649.55 to 1
748.76 to 1
848.09 to 1

For accurate Comp Ratio info use the calculator below.

Engine Brand: Viper

Engine Family: Mopar Viper/SRT

Engine Size: 506

Cylinder Bore Size: 4.040 in , 102.535 mm

Ring Groove Width: 1.2/1.2/3MM

Compression Height: 1.220"

Pin Diameter: 0.927"

Connecting Rod Length: 6.242"

Crankshaft Stroke: 3.960"

Cylinder Head: Mopar Viper/SRT

TDC Assembly Height: 9.442" ( 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:

-25cc Dish Top No Notch Mopar Viper/SRT
ChamberComp Ratio
649.55 to 1
748.76 to 1
848.09 to 1

For accurate Comp Ratio info use the calculator below.

Engine Brand: Viper

Engine Family: Mopar Viper/SRT

Engine Size: 506

Cylinder Bore Size: 4.040 in , 102.535 mm

Ring Groove Width: 1.2/1.2/3MM

Compression Height: 1.220"

Pin Diameter: 0.927"

Connecting Rod Length: 6.242"

Crankshaft Stroke: 3.960"

Cylinder Head: Mopar Viper/SRT

TDC Assembly Height: 9.442" ( 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