• PS CB:
  Valve Bowls Blended

• PS MI:
  Match Intake Port to BRODIX MG 1800

• PS Valve Job:
  Competition Valve Job

• Intake Valves:
  2.140 x 5.290 a.o.l. - BR 81050

• Exhaust Valves:
  1.600 x 5.300 o.a.l. - BR 81051

• Valve Springs:
  1.550 Roller Valve Spring - GA 1000,
    240 lb Closed, 550 lb Open,
    1.950 Installed Height,
    .700 Maximum Lift

• Retainers:
  1.550 10° Titanium - MA 2398BR

• Valve Locks:
  10° Jumbo - CC 611

• Rocker Studs:
  7/16 - BR 716L, AR RRS-4I

• Guide Plates:
  5/16 - BR 5160

• Valve Seals:
  11/32 - US VS529V

What Special parts are required to install 18X heads?
  • 18° Pistons
  • HV 1800 or HV 1801 Intake Manifold
  • Head Stud Kit
  • Longer Pushrods
  • Header Change if Spread Port (Stahl Pattern)
  • 40/60 Stud Girdle

What parts interchange from my BRODIX 23° heads?
  • Standard Roller Rockers
  • Standard Roller Lifters
  • Stud Girdle with 40/60 Valve Spacing



Special Intake Gaskets and Spread Port Exhaust Gaskets Are Available Exclusively From BRODIX

• Torque Heads:
  70 ft-lb

• Torque Rocker Studs:
  40-45 ft-lb

• Intake Gaskets:
  BRODIX MG 1800, COMETIC C3250

• Head Gaskets:
  350 - FEL-PRO 1003, COMETIC C5399
  400 - FEL-PRO 1004, COMETIC C5403

• Exhaust Gaskets:
  Standard-
    FEL-PRO 1406, COMETIC C5415
  Spread Port-
    BRODIX MG 52464 (trim to fit),
    COMETIC C5424

• Head Studs:
  ARP 234-4727
    (12 pt With 3/8 Center Studs)

• Accessory Bolt Holes Are Drilled

• Spark Plug Starting Points:
  NGK R5671A-9
    for Alcohol
  NGK R5671A-8
    for Racing Gas

• Spring Pockets:
  1.550 Out of the Box, May Be Cut
    to 1.625 - No Larger or Deeper

• Valve Angle:
  18°

• Angle Milling:
  .0065 in Per cc

• Flat Milling:
  .0055 in Per cc

• Angle Machining:
  Not Available

• Pushrod Slots:
  40/60

• Stud Girdle:
  40/60 - BR 6440

• Rocker Arms:
  Standard 7/16 Roller Rockers, or Shaft System with
  40/60 Spacing

• Lifters:
  Standard

• Pistons:
  Special 18°

• Pushrods:
  Special Length

• Intake Face Angle:
  BRODIX 10° Standard