BR X™ Series/20°

BR X™
• 20° Valve Angle
• 444 cc Intake Ports
• 2.400 / 1.800 Valve Sizes
• Flows 495 cfm
• Out-of-the-Box Horsepower
• 100 cc Combustion Chambers



The revolutionary new BR X from BRODIX is by far the most powerful “as cast” conventional head on the market with a raised .300”, 444 cc intake port that flows 495 cfm! The exhaust port flows 305 cfm through only a 1.800 valve. This head features an efficient 100 cc chamber, as well as a valve angle rolled to 20 degrees. This new head is completely compatible with all existing 20° BRODIX components. As always, these heads come standard with all the fine qualities that you have come to expect from BRODIX.

Package Heads

Facts and Related Components
• PS CB:
Valve Bowls Blended

• PS MI:
Match Intake Port to MG 2021

• PS Valve Job:
Competition Valve Job

• Intake Valves:
2.400 x 6.030 o.a.l. – BR 81403

• Exhaust Valves:
1.800 x 5.930 o.a.l. – BR 81080

• Valve Springs:
1.645 Roller Valve Spring – CC 947 or CC 948,
315 lb Closed, 915 lb Open,
2.100 Installed Height,
.850 Maximum Lift (Spring Upgrade)

1.640 Roller Valve Spring – MA 221424,
250 lb Closed, 745 lb Open,
2.050 Installed Height,
.800 Maximum Lift (Spring Upgrade)

• Retainers:
1.625 10° Titanium – MA 23640
1.645 10° Titanium – MA 2001

• Valve Locks:
10° Jumbo – CC 611

• Valve Seals:
11/32 – US VS529V (1.625 Spring)
11/32 – US VS485V (1.645 Spring)

 • Torque Heads:
70 ft-lb

• Torque Rocker Stands:
40-45 ft-lb

• Intake Gaskets:
BRODIX MG 2021, FLATOUT FG 8275

• Head Gaskets:
4.600 – FEL-PRO 1057, COMETIC C5434

• Exhaust Gaskets:
FEL-PRO 1412

• Valve Cover Gaskets:
BRODIX MG 2020, FLATOUT FG 6108.3

• Head Studs:
BRODIX SK HS SR 20 For BRODIX Aluminum Block
AR 235-4323 for Cast Iron Block

• Accessory Bolt Holes Are Drilled

• Spark Plug Starting Points:
NGK R5671A-10
For Alcohol
NGK R5671A-9
For Racing Gas

• Spring Pockets:
May Not be Cut Any Larger
or Deeper Than 1.750

• Valve Angle:
20° and 4° Intake
13° and 4° Exhaust

• Angle Milling:
.0066 in Per cc

• Flat Milling:
.0050 in Per cc

• Angle Machining:
Not Available

• Pushrod Slots:
Special

• Stud Girdle:
N/A

• Rocker Arms:
JESEL Or T&D Shaft System –
JESEL KPS 441184, T&D 3142

• Lifters:
Standard

• Pistons:
Special

• Pushrods:
Special Length

• Valve Covers:
BR SR 20 VC

• Intake Manifolds:
BM 2020 (Standard)
BM 2021 (Tall Deck)
• 4.600 Minumim Bore

Flow Chart cfm @ 28″ H20

Part Number Valve Size 0.200 0.300 0.400 0.500 0.600 0.700 0.800 0.900
BR X
(CNC Combustion
Chambers)		 2.400 Intake 167 250 338 404 461 489 488 495
1.800 Exhaust 106 169 215 249 269 286 301 305

Basic Easy Order Numbers

Part# Easy
Order #		 Port
Vol.		 Cham.
Vol.		 Int/Ext
Valve 		Spring Seat
Pressure		 Spring
Diam.		 Ret.
ST/TI		 Per
BR X Bare
 2070000 444 100         1
BR X Pkg
 2071000 444 100 2.400 / 1.800 250 1.640 TI 1
BR X Pkg
 2071001 444 100 2.400 / 1.800 315 1.645 TI 1
BR X Pkg
 2071002 444 97 2.400 TI / 1.800 TI 250 1.640 TI 1
BR X Pkg
 2071003 444 97 2.400 TI / 1.800 TI 315 1.645 TI 1