Brand:
PROMAXX Performance
Manufacturer's Part Number:
9317
Part Type:
Cylinder Heads
Product Line:
PROMAXX Performance Maxx Series Big Block Chevy Cylinder Heads
Combustion Chamber Volume (cc):
119
Intake Runner Volume (cc):
317cc
Exhaust Runner Volume (cc):
135cc
Cylinder Head Style:
Bare
Cylinder Head Material:
Cast aluminum
Intake Port Shape:
Rectangular
Intake Valve Diameter (in.):
2.300 in.
CNC-Machined Combustion Chamber:
No
CNC-Machined Intake Runner:
No
CNC-Machined Exhaust Runner:
No
Intake Port Location:
Standard
Exhaust Port Shape:
Round
Exhaust Port Location:
Raised
Spark Plug Style:
Straight
Intake Valves Included:
No
Exhaust Valves Included:
No
Exhaust Valve Diameter (in.):
1.880 in.
Valve Springs Included:
No
Damper Spring Included:
No
Retainers Included:
No
Locks Included:
No
Valve Stem Seals Included:
No
Rocker Arm Studs Included:
No
Rocker Arms Included:
No
Rocker Arm Nuts Included:
No
Guideplates Included:
No
Valve Cover Mounting Style:
Perimeter bolt
Accessory Bolt Holes Drilled:
Yes
Intake Valve Angle:
24
Exhaust Valve Angle:
15
Valve Guides Included:
Yes
Valve Guide Material:
Manganese bronze
Valve Seats Machined:
Yes
Valve Seat Machine Style:
5-angle
Valve Seat Material:
Steel
Cylinder Head Color:
Natural
Steam Holes Drilled:
No
Machined for O-Ring:
No
Heat Crossover:
No
Remanufactured:
No
Quantity:
Sold as a pair.
PROMAXX Performance Maxx Series Big Block Chevy Cylinder Heads
PROMAXX Performance Maxx Series big block Chevy cylinder heads are custom designed to satisfy demands of the big block Chevy world, while retaining high-quality craftsmanship and reasonable prices. Available assembled or bare, these heads feature ultra-smooth 356 T-6 aluminum castings with hand-blended valve bowls, efficient chamber designs, 5-angle valve jobs, and diamond-honed bronze valve guides. Assembled heads include 21-4N swirl-polished valves, springs, retainers, 7/16 in. rocker studs, guide plates, and seals. Level up your ride with a pair of PROMAXX Performance Maxx Series big block Chevy cylinder heads.
