CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.
Recommended for moderate street or street/strip applications with displacements up to 509 cubic inches, operating at or below 6500 RPM. The intake runners and exhaust ports are partially CNC machined, while the combustion chambers are offered with partial or full CNC machining with a bowl blend. These 305cc big block chevy magnum cylinder heads are capable of flowing 368 CFM at 0.700" of lift.
| 305cc Aluminum BBC Cylinder Heads | ||
|---|---|---|
| Part # | Description | Combustion Chamber |
| 2100 | CNC Bowl Blend & Partial CNC Chamber | 117cc |
| 2100-1 | CNC Bowl Blend & Fully CNC Chamber | 121cc |
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| 305cc BBC Partial CNC Chamber | ||||||
| .200 | .300 | .400 | .500 | .600 | .650 | |
| Int | 154 | 223 | 287 | 335 | 363 | 368 |
| Exh | 133 | 175 | 210 | 239 | 261 | 268 |
| 305cc BBC Full CNC Chamber | ||||||
| .200 | .300 | .400 | .500 | .600 | .650 | |
| Int | 168 | 242 | 303 | 339 | 360 | 362 |
| Exh | 142 | 187 | 225 | 252 | 271 | 274 |
Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.310", 3/4" radius plate exhaust, 2 1/8" curved pipe
| Included Components | |
| 50% CNC Ported Combustion Chambers | |
| 20% CNC Ported Exhaust Ports | |
| 30% CNC Ported Intake Ports | |
| Competition 5-angle valve job | |
| 11/32" Intake Valve, 2.250" x 5.500" O.A.L |
7620
|
| 11/32" Nail Head Exhaust Valve, 1.880" x 5.450" O.A.L |
7630
|
| PAC Racing Spring #1224 1.625 O.D. Solid Roller, 275lbs on seat, .850 Maximum Lift, Max RPM 7400-7600 |
8031
|
| Manley 10° Steel Retainers 1.500" O.D x 1.168" I.D x .844" I.D |
8518
|
| 10° 11/32" Valve Locks with lashcap recess |
9005
|
| ARP 7/16" Rocker Exhaust Studs |
6406
|
| ARP 7/16" Rocker Intake Studs |
6407
|
| Adjustable 3/8" Guide Plates |
6109
|
| 11/32" Viton Valve Seals |
AFR #6613
|
| Hardened Spring Cup 1.740" O.D / 1.650" I.D |
8046
|
| Intake Valve Seats 2.450" O.D x 2.000" I.D x .375" Deep |
9065
|
| Exhaust Valve Seats 2.000" O.D x 1.580" I.D x .375" Deep |
9064
|
| 11/32" Intake Bronze Valve Guides .502" O.D x 2.10" O.A.L |
AFR #9041
|
| 11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L |
AFR #9042
|
| Recommended Components: | |
| Intake Port Gasket |
6853 (.120" Thick)
|
| Intake Port Gasket |
6855 (.060" Thick)
|
| Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit AFR heads. | |
| Exhaust Port Gasket |
6858
|
| Head Gasket, Fel-Pro #1047 (Mark V and VI) |
6849
|
| Head Gasket,, Fel-Pro #1017-1 (Mark IV) |
6850
|
| Head Bolts, ARP 135-3703 (Mark IV) |
6306
|
| Head Bolts, ARP 135-3707 (Mark V) |
6308
|
| Head Studs, ARP 235-4713 |
6307
|
| Head Bolt Washers, Manley |
6320
|
| Stud Girdle, (AFR Specific) |
6202
|
| 7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry) |
6043
|
| 1.7 Shaft Mount Rocker Arms T&D |
6065
|
| Suggested Manifold |
Victor Jr
|
| Suggested Manifold |
Super Victor
|
| Spark Plug Starting Range |
Autolite 3924
|
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
305cc
|
| Intake Port Dimension |
2.380"H x 1.680"W x 11/32 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
132cc
|
| Exhaust Port Dimension |
1.720"H x 1.920" W
|
| Exhaust Port Location |
.375" Raised
|
| Combustion Chamber Size(As Cast) |
117cc
|
| Combustion Chamber Size(Full CNC) |
121cc
|
| Valve Cover Bolt Pattern |
Perimeter Bolt
|
| Valve Angle |
24°/4° Int, 15°/4° Exh
|
| Valve Spring Pocket Diameter |
1.725" O.D
|
| Max Valve Spring Pocket Machining |
1.750" O.D
|
| Deck Thickness |
.750"
|
| Minimum Bore Diameter |
4.250"
|
| Flat Mill |
.006" per cc/ Maximum 108cc as cast or 114cc CNC Chamber
|
| Angle Mill |
.009" per cc/ Maximum 104cc as cast or CNC Chamber
|
| Note:Angle mills might require a .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
2.993 sq. in.
|
| Spark Plug Dimensions |
14mm x .750" w/Gasket Seat
|
SHIPS IN THE LOWER 48 STATES FREE!
CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.
CONTACT US THE PRICE IS NEGOTIABLE BEST OFFER
Warning: May cause cancer and reproductive harm.
