PROMAXX Performance OE-Replacement Jeep Inline Cylinder Heads *:CHR640N

Brand:
PROMAXX Performance
Manufacturer’s Part Number:
*:CHR640N
Part Type:
Cylinder Heads
Product Line:
PROMAXX Performance OE-Replacement Jeep Inline Cylinder Heads
Summit Racing Part Number:
PMX-CHR640N
Cylinder Head Style:
Assembled
Cylinder Head Material:
Cast iron
Intake Valve Diameter (in.):
1.910 in.
CNC-Machined Combustion Chamber:
No
CNC-Machined Intake Runner:
No
CNC-Machined Exhaust Runner:
No
Intake Port Location:
Standard
Exhaust Port Location:
Standard
Spark Plug Style:
Straight
Intake Valves Included:
Yes
Exhaust Valves Included:
Yes
Exhaust Valve Diameter (in.):
1.500 in.
Valve Springs Included:
Yes
Damper Spring Included:
No
Number of Springs Per Valve:
Single
Retainers Included:
Yes
Retainer Material:
Steel
Locks Included:
No
Valve Stem Seals Included:
Yes
Valve Stem Seal Style:
Positive stop
Rocker Arm Studs Included:
No
Rocker Arms Included:
No
Rocker Arm Nuts Included:
No
Guideplates Included:
No
Valve Cover Mounting Style:
Center and perimeter bolt
Accessory Bolt Holes Drilled:
Yes
Valve Guides Included:
Yes
Valve Guide Material:
Bronze
Valve Seats Machined:
No
Cylinder Head Color:
Natural
Steam Holes Drilled:
No
Oiling Style:
Through head
Machined for O-Ring:
No
Heat Crossover:
No
Quantity:
Sold individually.
Notes:
Cylinder head design is from OEM Jeep 0331 casting with structural improvements. Will fit engines with head casting numbers 0331, 0630 or 7120.

PROMAXX Performance OE-Replacement Jeep Inline Cylinder Heads

PROMAXX Performance OE-replacement Jeep inline cylinder heads offer direct bolt-on power. Developed and designed from factory castings, these iron heads feature hardened valve seats and heavier-than-stock castings to resist cracking and warping. They replace your stock components and restore original performance. Once again, your rig will be readied to take on aggressive off-road adventures. The heads are available complete with valves and springs. Order the model recommended for your engine application.