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BR X™ Series/20°

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.

BR X™ Series/20°

• 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

HEAD DETAILS

PACKAGE HEADS, FACTS and RELATED COMPONENTS

Package Heads

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 – PAC 1247 or PAC 1248,
315 lb Closed, 875 lb Open,
2.100 Installed Height,
.850 Maximum Lift (Spring Upgrade)

1.640 Roller Valve Spring – PAC 1224,
270 lb Closed, 775 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)

Facts & Related Components

Torque Heads:

70 ft-lb

Torque Rocker Studs:

40-45 ft-lb

Exhaust Gaskets:

FEL-PRO 1412

Head Studs:

BRODIX SK HS SR 20 For BRODIX Aluminum Block
AR 235-4323 for Cast Iron Block

Intake Valve Seats:

P 2.460 x .450

Intake and Exhaust Valve Guides:

BH 545 11/32 PL

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:

N/A

Lifters:

Standard

Pistons:

Special

Pushrods:

Special Length

Valve Cover:

MOROSO 68483

FLOW CHART
Flow Chart cfm @ 28" H20

Part #

Valve Size

0.200

0.300

0.400

0.500

0.600

0.650

0.700

0.800

0.900

BR X
2.400 Intake
167
250
338
404
461
489
BR X
1.800 Exhaust
106
169
215
249
269
286
EASY ORDER NUMBERS

Part #

Easy Order #

Port Vol.

Cham. Vol.

Int/Exh Valve

S. S. 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
INSTRUCTION MANUAL

(479) 394-1075

301 Maple Ave.
P.O. Box 1347
Mena, Arkansas 71953

  • Cast Iron Big Block Chevy Compatible
  • BRODIX® Blocks In Stock
  • Important Announcement
  • April 2021 Sale
  • VC 101 Valve Cover Sale
  • Nothing Says Love Like VC 201™ Big
  • Block Valve Covers

Copyright © 2022 Brodix All Rights Reserved. 
NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLE 
Products purchased from BRODIX® may be subject to sales tax.

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