BB-4™ and BB-5™ Series/24°

Package Heads

Facts and Related Components

• PS MI:
Match Intake Port to BRODIX MG 2001

• PS Valve Job:
Competition Valve Job

• Intake Valves:
2.300 x 5.468 o.a.l. – BR 81241
(Standard Package)

2.300 x 5.568 o.a.l. – BR 81341
(Spring Upgrade)

2.350 x 5.568 o.a.l. – BR 81351
(Spring Upgrade)

• Exhaust Valves:
1.880 x 5.394 o.a.l. – BR 81038
(Standard Package)

1.880 x 5.494 o.a.l. – BR 81138
(Spring Upgrade)

1.900 x 5.494 o.a.l. – BR 81139
(Spring Upgrade)

• Valve Springs:
1.550 Roller Valve Spring – GA 1000,
240 lb Closed, 550 lb Open,
1.950 Installed Height,
.700 Maximum Lift
(Standard Package)
1.640 Roller Valve Spring – MA 221424,
250 lb Closed, 745 lb Open,
2.050 Installed Height,
.800 Maximum Lift
(Spring Upgrade)

• Retainers:
1.550 10° Steel – CC 752
1.625 10° Titanium – MA 23640

• Valve Locks:
10° Jumbo – CC 611

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

• Guide Plates:
3/8 – CC 4806

• Valve Seals:
11/32 – US VS529V

• Torque Rocker Studs:
40-45 ft-lb

• Intake Gaskets:
BRODIX MG 2001, Cometic C5428,
FEL-PRO 1252-3

• Head Gaskets:
4.310 – FEL-PRO 1027, COMETIC C5432
4.540 – FEL-PRO 1017, COMETIC C5433
4.600 – FEL-PRO 1057, COMETIC C5434

• Exhaust Gaskets:
FEL-PRO 1411, COMETIC C5429

• Head Bolts:
ARP 135-3606, MANLEY 42192 Bolts / 42102 Washers

• Head Studs:
ARP 235-4702 (12 pt)

• 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 1.625

• Valve Angle:
24° and 4° Intake,
15° and 4° Exhaust

• Angle Milling:
.0066 in Per cc

• Flat Milling:
.0050 in Per cc

• Angle Machining:
Not Available

• Dowel Shift:
Not Available

• Pushrod Slots:
Standard

• Stud Girdle:
Standard, BRODIX 1230

• Rocker Arms:
Standard

• Lifters:
Standard

• Pistons:
2° Valve Rolled Piston

• Pushrods:
Check Pushrod Clearance with Head Installed on the
Engine Block Before Final Assembly

• Valve Centerline:
Standard

• Intake Manifold:
SA 2012 / SA 2020