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PROMAXX Performance Maxx Series Big Block Chevy Cylinder Heads 9319T
Part Number: PMX-9319T
PROMAXX Performance Maxx Series Big Block Chevy Cylinder Heads
Cylinder Heads, Maxx Series, Solid Roller Titanium, Assembled, Aluminum, 317cc Intake Runner, Chevrolet, Big Block, Pair
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Estimated Ship Date: Nov 5, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
9319T
Part Type:
Product Line:
Summit Racing Part Number:
PMX-9319T
Combustion Chamber Volume (cc):
119
Intake Runner Volume (cc):
317cc
Exhaust Runner Volume (cc):
135cc
Cylinder Head Style:
Assembled
Cylinder Head Material:
Cast aluminum
Camshaft Style:
Solid roller
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 Location:
Raised
Intake Valves Included:
Yes
Exhaust Valves Included:
Yes
Exhaust Valve Diameter (in.):
1.880 in.
Valve Springs Included:
Yes
Maximum Valve Lift (in.):
0.700 in.
Damper Spring Included:
No
Number of Springs Per Valve:
Dual
Retainers Included:
Yes
Retainer Material:
Steel
Locks Included:
Yes
Lock Style:
7 degree
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:
Yes
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
Oiling Style:
Through pushrod
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.
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Some parts are not legal for use in California or other states with similar laws / regulations
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