BR 3™ Series LS3 Compatible Series Cylinder Heads/15°

BR 3™
• 15° Valve Angle
• 2.165 / 1.590 Valve Sizes
• Out-of-the-Box Horsepower
• 71 cc Combustion Chambers
• LS3 Compatible
• Uses Existing LS3 Rockers

 

BP BR 3™
• 100% CNC Ported
• 280 cc Intake Ports
• Flows Over 360 cfm
• 15° Valve Angle
• LS3 Compatible
• Uses All Standard LS3 Components

 

BRODIX delivers the industry’s most durable replacement for the LS3 style cylinder heads with the introduction of the BR 3 series. The BP BR 3 is a 100% CNC ported head that features a 280 cc intake port that flows over 363 cfm. The BR 3 is the unported version designed for outstanding “out-of-the-box” performance. Both heads utilize a 15° valve angle, a 71 cc combustion chamber, and a 2.165 / 1.590 valve combination, and accept all standard LS3 components. The BR 3 series shares all of the legendary BRODIX features including easily repairable A-356 virgin aluminum alloy and the strongest deck surface in the industry.

Package Heads

Facts and Related Components

• PS CB:
Valve Bowls Blende• PS MI:
Match Intake Ports to FEL-PRO 1223-3

• PS Valve Job:
Competition Valve Job

• Intake Valves:
2.165 x 4.900 o.a.l. x 8 mm Stem, Beadlock – MA 11686

• Exhaust Valves:
1.590 x 4.923 o.a.l. x 8 mm Stem, Beadlock -MA 11661

• Valve Springs:
1.350 Hydraulic Roller Valve Spring – MA 221435,
180 lb Closed, 435 lb Open,
1.850 Installed Height,
.700 Maximum Lift

• ID Locators:
MANLEY 42135

• Retainers:
1.290 7° Steel – MA 23610

• Valve Locks:
MA 13098

• Rocker Studs:
N/A

• Guide Plates:
N/A

• Valve Seals:
8 mm – US VS31500 V

• Torque Heads:
11 mm Studs – 85 ft-lb With Oil
8 mm Studs – 26 ft-lb With Oil• Torque Rocker Studs:
22 ft-lb

• Intake Gaskets:
FEL-PRO 1223-3

• Head Gaskets:
GM 19170418

• Exhaust Gaskets:
FEL-PRO MS 92467

• Head Studs:
ARP 234-4319 (6 pt) for L92 / LS3 Blocks

• Accessory Bolt Holes Are Drilled

• Spark Plug Starting Points:
NGK R5671A-7
for Pump Gas
NGK R5671A-8
for Racing Gas

• Spring Pockets:
May Not Be Cut Any Larger or Deeper 1.350

• Valve Angle:
15°

• Flat Milling:
.0060 in PER cc

•Dowel Shift:
Standard

• Pushrod Slots:
Standard

• Pistons:
Standard

• Rocker Arms:
Standard

• Lifters:
Standard

• Pushrods:
Standard

• Valve Centerline:
Standard

• Intake Manifold:
Standard

Flow Chart cfm @ 28″ H20

Part Number Valve Size
0.200
0.300
0.400
0.500
0.600
0.650
7.000
BP BR 3
(CNC Ported)
2.165 Intake 146 213 268 318 347 357 364
1.590 Exhaust 100 146 183 209 226 229 234

Basic Easy Order Numbers and More

Part# Easy
Order #
Port
Vol.
Cham.
Vol.
Int/Ext
Valve
Spring Seat
Pressure
Spring
Diam.
Ret.
ST/TI
Per
BR 3 Bare 1173000             2
BR 3 Pkg 1173001     2.165 / 1.590 180 1.350 ST 2
BP BR 3 Bare 1173002 280 71         2
BP BR 3 PKG
1173100 280 71 2.165 / 1.590 180 1.350 ST 2