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ProMaxx Performance 440 MAXX Aluminum Cylinder Heads Big Block Chrysler (B/RB)

ProMaxx Performance 9440


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ProMaxx Performance 440 MAXX Aluminum Cylinder Heads Big Block Chrysler (B/RB) $1,075.99
440 MAXX Aluminum Cylinder Heads
  • Big Block Chrysler (B/RB)
  • 210cc Intake Ports
  • 84cc Combustion Chambers
  • 2.14" Intake, 1.81" Exhaust Valves
  • .600" Lift Hyd. Roller Valve Springs
  • As-Cast Ports & Chambers
  • Assembled, 2/pkg.

  • ProMaxx Performance 9440 Details

    210cc Intake Ports


    Additional Cylinder Head Specifications

    • Valve Angle: 15°
    • Valve Seal Material: Viton
    • Spark Plug Type: Angled
    • Retainer Material: Steel
    • Maximum Spring Lift: .600" Hydraulic Roller
    • Through Head Oiling System
    • Standard Port Locations
    • Bronze Valve Guides


    Manufacturer's Part Number:

    Maxx Quality, Performance and Affordibility!

    The ProMaxx MAXX Series Big Block Chrysler Aluminum Cylinder Heads are taking affordable performance street and strip cylinder heads to the next level. The As-Cast heads utilize ultra-smooth A356-T6 aluminum castings, new runner and chamber designs to produce CNC ported type flow numbers! The 210cc intake runner design heads flow over 295cfm! This combined with a 5-angle competition valve job, diamond-honed bronze guides, hand bowl blending, and professional assembly to outperform the best brands in the business.

  • A356-T6 Aluminum Construction
  • Available As-Cast with 210cc Intake Ports or 100% CNC-Ported with 240cc Intake Ports
  • As-Cast Heads feature some hand bowl blending
  • Efficient chamber design
  • Available bare or assembled
  • 5-angle competition valve job
  • Diamond-honed bronze guides
  • "MAXX" power for street or strip
  • Sold in pairs

  • 9440 is rated 4.0 out of 5 by 2.
    Rated 4 out of 5 by from Pro Maxx Mopar big block Pretty nice heads for price. The only negative is need some port matching which I was going to do anyway. But they have a little core shift matching the gaskets. Should be able to get them to line up ok.
    Date published: 2017-09-11
    Rated 4 out of 5 by from Great looking product Heads look like a high quality product. I would have given 5 stars but I haven't started by engine yet I don't expect any problems.
    Date published: 2017-05-28
    • y_2018, m_6, d_20, h_5
    • bvseo_bulk, prod_bvrr, vn_bulk_2.0.8
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_2
    • loc_en_US, sid_10001_10001_2944689, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs

    Are the bolt holes on the intake and exhaust side and the rocker stands heli-coiled? Are the exhause bolt holes blind? (not into the water jacket like factory heads)

    Asked by: rwcjr58
    These heads are not heli-coiled and it would appear that the exhaust bolts do not go into the water jacket.
    Answered by: Rusty B
    Date published: 2018-06-05
    • y_2018, m_6, d_20, h_5CST
    • bvseo_bulk, prod_bvqa, vn_bulk_2.0.8
    • cp_1, bvpage1
    • co_hasquestionsanswers, tq_1
    • loc_en_US, sid_10001_10001_2944689, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_jegs
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    Some parts are not legal for use in California or other states with similar laws / regulations