Better Built Performance came up with a new Short Block changing the game. The 420ci 6.4L based engine adds the right amount of stroke to gain the extra torque but leaving enough room to spin it up in RPM's. Tested at 1200RWHP and Pass after Pass at the track this Short Block will carry you to the next Level.   

Block Prep: 
Casting inspection
Sonic Check cylinder walls
Deburr interior surfaces
Chamfer and Radius edges
Cylinder Bore and Hone
Line Bore and Hone
Total Block Cleansing

Assembly:  

4340 Forged Crankshaft / Keyed for Damper
4340 H-Beam HD Rods w/ ARP2000 Rod Bolts
Diamond Racing 2618 Piston / Steel Top Ring 
ARP Main Studs
H-Series Bearings 

Specifications:
Cubic Inches: 420
Liters: 6.9
Bore Size: 4.095"
Rod Length: 6.125"
Stroke: 4.00"

Please allow up to 4 weeks delivery. Each engine is custom built to specification. 

Call or email to discuss your 6.4L HEMI build. 

 

2009-2023 Dodge Challenger 5.7L/6.2L/6.4L VVT
2009-2023 Dodge Charger 5.7L/6.2L/6.4L VVT
2012-2023 Jeep Grand Cherokee 5.7L/6.2L/6.4L VVT
2009-2023 RAM 1500/2500/3500 5.7L/6.2L/6.4L VVT