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ProMaxx Maxx 317 Chev BB Aluminum Heads
Made right here in the USA. Taking the affordable performance cylinder head to the next level. 317cc intake runners great for street, street/strip, power tour, or smaller cubic inch competition (427-525ci). Custom designed to meet the demands of the BBC world, while keeping the quality high and the price reasonable. Ultra smooth casting made of Grade A 356-T6 aluminum is precision CNC machined creating the perfect platform for new runner and chamber designs. 5 angle competition valve job, diamond honed bronze guides, hand bowl blending, and assembly by professional builders. Produces out of box performance that outperforms the top brands in the industry. MAXX quality and MAXX performance at minimum pricing - ProMaxx Performance. CNC and larger port versions coming soon.
Part Type: Cylinder Head
Application: Chevrolet Big Block
Cylinder Head Material: Aluminum
Bare or Assembled: Bare
Combustion Chamber Size: 119cc
CNC Machined Combustion Chambers: No
Intake Valve Angle: 26
Exhaust Valve Angle: 26
Intake Port Volume: 317cc
CNC Machined Intake Port: No
Intake Port Flow:
Intake Port Location: Standard
Intake Port Shape: Rectangular
Intake Port Dimensions:
Suggested Intake Gaskets:
Exhaust Port Volume:
CNC Machined Exhaust Port: No
Exhaust Port Flow:
Exhaust Port Location: Standard
Exhaust Port Shape: D-shaped
Exhaust Port Dimensions:
Suggested Exhaust Gaskets:
Spark Plug Style:
Suggested Spark Plug:
Valve Guides: Yes
Valve Guide Spacing:
Valve Stem Diameter:
Valve Seats: Yes
Valve Job:
Intake Valve Diameter: 2.250"
Intake Valve Included: No
Exhaust Valve Diameter: 1.880"
Exhaust Valve Included: No
Suggested Valve Length:
Valve Spring Pockets:
Valve Springs Included: No
Valve Spring Application: NA
Valve Springs Retainers Included: No
Valve Locks Included: No
Valve Seals Included: No
Rocker Studs Included: No
Guide Plates Included: No
Valve Cover Mounting Style: Perimeter bolt
Steam Holes Drilled: No
Heat Crossover: No
Suggested Head Bolts:
Suggested Head Studs:
Suggested Stud Girdle:
Head Bolt Torque with Oil: 65 ft./lbs. (short bolts) 75 ft./lbs. (long bolts)
Rocker Stud Torque with Oil: 45 ft./lbs.
Intake Bolt Torque with Oil:
Manufacturer: ProMaxx Performance
Manufacturer's Part Number: 9317
Weight:
Warranty: Race Application, No warranty expressed or implied
Quantity: Sold as Each
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