AFR BBC 335/121cc CNC magnum cylinder heads (pair)
SKU: AFR2001
$8,639.09
| AFR BBC 335/121cc CNC magnum cylinder heads (pair) |
Description
335cc BBC Rectangle Port Cylinder Head
Recommended for radical streep/strip or “Pro Street” applications with displacements up to 572 cubic inches, operating at or belwo 7000 RPM. Featuring fully CNC machined intake runners, exhaust ports and combustion chambers; these heads are capable of flowing 410 CFM at 0.800″ of lift.
| Included Components | |
| 100% CNC Ported Combustion Chambers | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
| Competition 5 Angle Valve Job | |
| 11/32″ Intake Valve, 2.300″ x5.500″ O.A.L |
AFR #7626
|
| 11/32″ Tulip Exhaust Valve, 1.880″ x 5.450″ O.A.L |
AFR #7631
|
| PAC Racing #1224 1.625” OD Solid Roller Dual Valve Spring 275 lbs. on seat, .850” maximum lift, Max RPM 7400-7600 (upgrades available) |
AFR #8031
|
| 10° Steel Retainers 1.500″ O.D x 1.168″ I.D x .844″ I.D |
AFR #8518
|
| 10° 11/32″ Valve Locks with lashcap recess |
AFR #9005
|
| ARP 7/16” Rocker Studs Intake |
AFR #6407
|
| ARP 7/16” Rocker Studs Exhaust |
AFR #6406
|
| Adjustable 3/8″ Guide Plates |
AFR #6109
|
| 11/32″ Viton Valve Seals |
AFR #6613
|
| Hardened Spring Cup 1.740″ O.D / 1.650″ I.D |
AFR #8046
|
| Intake Valve Seats 2.450″ O.D x 2.000″ I.D x .375″ Deep |
AFR #9065
|
| Exhaust Valve Seats 2.000″ O.D x 1.580″ I.D x .375″ Deep |
AFR #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
|
| 335cc Competition Flow Chart | |||||||
| .200 | .300 | .400 | .500 | .600 | .700 | .800 | |
| Int | 164 | 240 | 304 | 352 | 385 | 401 | 409 |
| Exh | 135 | 199 | 249 | 276 | 288 | 295 | 305 |
Test conducted at 28″ of water (pressure) on Superflow 1020
Bore Size: 4.600″, intake 3/4″ radius plate exhaust, 2 1/8″ curved pipe
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
335cc
|
| Intake Port Dimension |
2.455″H x 1.755″W x 13/32 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
135cc
|
| Exhaust Port Dimension |
1.780″H x 2.025″ W
|
| Exhaust Port Location |
.375″ Raised
|
| 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 114cc
|
| Angle Mill |
.009″ per cc/Maximum 104cc
|
| Note: Angle mills might require a .120″ thick intake gasket. | |
| Minimum Cross Sectional Area |
3.275 sq. in.
|
| Spark Plug Dimensions |
14mm x .750″ w/Gasket Seat
|
| CARB Status: THESE PRODUCTS ARE ILLEGAL TO OPERATE ON ANY PUBLIC HIGHWAY. THIS MEANS ANY PUBLIC PAVED OR UNPAVED ROADWAY OR IN A PUBLIC PARK. THESE PRODUCTS ARE ONLY LEGAL IF USED ON A DEDICATED RACING VEHICLE. VIOLATION ARE SUBJECT TO A MAXIMUM PENALTY OF $37,500 PER VIOLATION PER VEHICLE, REVOCATION OF REGISTRATION BY DMV, LOSS OF USE ON PUBLIC RIGHT OF WAYS AND PROOF OF CORRECTION OF THE TAMPERING. | |
| Recommended Components: | |
| Intake Port Gasket |
AFR #6853 (.120″ Thick)
|
| Intake Port Gasket |
AFR #6855 (.060″ Thick)
|
| Important: Do not use your AFR gasket as a template to port match your intake manifold as one AFR gasket is used for many AFR runner volumes. | |
| Exhaust Port Gasket |
AFR #6858
|
| Head Gasket |
Fel-Pro #1017-1 (Mark IV) or AFR #6850
|
| Head Gasket |
Fel-Pro #1047 (Mark V and VI) or AFR #6849
|
| Head Bolts |
ARP 135-3703 (Mark IV) or AFR #6306
|
| Head Bolts |
ARP 135-3707 (Mark V) or AFR #6308
|
| Head Studs |
ARP 235-4713 or AFR #6307
|
| Head Bolt Washers |
Manley, AFR #6320
|
| Stud Girdle, (AFR Specific) |
AFR #6202
|
| 7/16 Stud Mount Rocker Arms – 1.7 Ratio (For Optimized Geometry) |
AFR #6043
|
| 1.7 Shaft Mount Rocker Arms T&D |
AFR #6065
|
| Shaft Mount Rocker Arms |
Crower or Jesel Pro Series
|
| Suggested Manifold |
Victor Jr
|
| Suggested Manifold |
Super Victor
|
| Spark Plug Starting Range |
Pump Gas 3924 / Race Gas 3922
|
| Note: 1” longer head bolt needed on four bottom exhaust bolt holes. | |
Additional information
| Part Number | AFR2001 |
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