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AFR 3670 BBC 300/112CC .725 LIFT COMPLETE LOWEST PRICE ON EVERY PART NUMBER MADE
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AFR 3670 BBC 300/112CC .725 LIFT COMPLETE LOWEST PRICE ON EVERY PART NUMBER MADE
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AFR 3670 BBC 300/112CC .725 LIFT COMPLETE LOWEST PRICE ON EVERY PART NUMBER MADECALL SHANON AT 507 445 3235 WITH ANY QUESTIONS. Recommended for aggressive street, street strip or race big block chevys with displacements up to 540 cubic inches operating at or below 6800 RPM. The 300cc oval port cylinder heads feature 100% CNC machined intake runners, exhaust ports and combustion chambers; our 300cc oval port flows 388 CFM at 0. 700" lift and is the ultimate street race weapon without having to step up to a rectangular port design.
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CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS.
Recommended for aggressive street, street/strip or race big block chevys with displacements up to 540 cubic inches operating at or below 6800 RPM. The 300cc oval port cylinder heads feature 100% CNC machined intake runners, exhaust ports and combustion chambers; our 300cc oval port flows 388 CFM at 0.700" lift and is the ultimate street/race weapon without having to step up to a rectangular port design.
| 300cc Aluminum BBC Cylinder Heads | ||
|---|---|---|
| Part # | Description | Combustion Chamber |
| 3670 | Fully CNC Ported - Hydraulic Roller | 112cc |
| 3680 | Fully CNC Ported - Solid Roller | 112cc |
Click part # to add product to your cart
| 300cc BBC | ||||||||
| .200 | .300 | .400 | .500 | .550 | .600 | .650 | .700 | |
| Int | 165 | 240 | 300 | 345 | 369 | 380 | 390 | 394 |
| Exh | 135 | 185 | 234 | 266 | 285 | 295 | 301 | 314 |
Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.500", 3/4" radius plate exhaust, 1 7/8" curved pipe
| Included Components | |
| 100% CNC Ported Exhaust Ports | |
| 100% CNC Ported Intake Ports | |
| 100% CNC Ported Combustion Chambers | |
| Competition 5-angle Valve Job | |
| 11/32" Intake Valve, 2.300" x 5.500" O.A.L |
7626
|
| 11/32" Nail Head Exhaust Valve, 1.880" x 5.450" Overall Valve Length |
7630
|
| PAC Racing #1940 1.550??? OD Hydraulic Roller Dual Valve Spring 175 lbs. on seat, .725??? maximum lift, Max RPM 6500-6700 Uses #8511 Steel Retainer and #8048 Spring Cup |
8002
|
| PAC Racing Spring #1224 1.625 O.D. Solid Roller, 275lbs on seat, .850 Maximum Lift, Max RPM 7400-7600, Uses #8518 Steel Retainer (upgrades available) |
8031
|
| Manley 10° Steel Retainers 1.500" O.D x 1.120" I.D x .705" I.D |
AFR #8511 for spring #8002
|
| Manley 10° Steel Retainers 1.500" O.D x 1.168" I.D x .844" I.D |
AFR #8518 for spring #8031
|
| 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 |
6610
|
| Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D |
8046
|
| Intake Valve Seats 2.450" O.D x 1.950" 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 | 9047 |
| 11/32" Exhaust Bronze Valve Guides .502" O.D x 2.25" O.A.L |
9048
|
| Recommended Components: | |
| Intake Port Gasket |
6863
|
| 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 |
RPM Performer
|
| Spark Plug Starting Range |
Autolite 3924
|
| Specifications & Features: | |
| Material |
A356 Aluminum
|
| Intake Port Volume |
300cc
|
| Intake Port Dimension |
2.055"H x 1.840"W x1/2 Radius
|
| Intake Port Location |
Stock
|
| Exhaust Port Volume |
135cc
|
| Exhaust Port Dimension |
1.770"H x 2.010" W
|
| Exhaust Port Location |
.375" Raised
|
| Combustion Chamber Size(Full CNC) |
112cc
|
| 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 102cc
|
| Angle Mill |
.009" per cc/ Maximum 97cc
|
| Note:Angle mills might require a .120" Thick intake gasket. | |
| Minimum Cross Sectional Area |
3.020 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.
AFR 3670 BBC 300/112CC .725 LIFT COMPLETE LOWEST PRICE ON EVERY PART NUMBER MADE
Item no
:
11643754511
US$ 3807.54
Pay in 4 interest-free payments of $951.88 Learn more
Min. order:
1piece
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jun 22 - Jun 27
US$40
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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