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AFR 290cc Oval Port Magnum BBC CNC Ported
Aluminum Cylinder Heads for all Big Block Chevys
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The Ultimate Street Strip Weapon
For the ultimate in "Oval Port" performance, the fully CNC ported AFR 290 has no competition.
With flow figures most small to medium sized rectangular port castings would be envious of,
these high flowing "Ovals": produce tremendous airspeed and really pack a punch.
Ideally suited for 296-509 CID street and strip performance, as well as circle track
applications which require strong low and mid-range torque to help accelerate a car
coming off a corner. Once again, AFR has included it's trademark 3/4” deck,
reinforced rocker stud bosses, and thick rugged castings, so you can own the strongest
and most efficient heads on the market today. Premium hardware such as Ferrea 2.25/1.880
one piece stainless valves, 1.550 double springs, 10 degree locks and retainers,
and high quality studs and guideplates all come as standard equipment. Take not the higher
flowing exhaust ports are raised .375 over stock location, and therefore these heads might
not be a direct bolt-on in every application. These heads have no EGR and are not emissions legal.
Note:
Optional stud girdle required for 2º rolled valve angles and 1” longer head bolts
needed on four bottom exhaust bolt holes.
FREE Shipping on ALL AFR Heads!!!
All AFR BBC Heads not "In Stock" are made to order (4-6 WEEK BUILD TIME) and are ordered after payment is received. Contact us to see if the heads you want are in stock.
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| Kit Description |
Part Number |
Price |
Buy |
| 290cc CNC Ported Competition Package NO PARTS 119cc |
3630 |
$2279 |
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| 290cc CNC Ported Competition Package w/Hydraulic or Solid Flat Tappet Springs 121cc |
3640 |
$2762 |
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| 290cc CNC Ported Competition Package w/Solid Roller Springs 121cc |
3650 |
$2668 |
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Intake Port:
Combustion Chamber:
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Exhaust Port:
Basic Package Components:
100% CNC Ported Combustion Chambers
100% CNC Ported Exhaust Ports
100% CNC Ported Intake Ports
3-angle Valve Job/Radiused Exhaust
Intake Valve, 2.250” stainless steel #7620
Exhaust Valve, 1.880” stainless steel #7630
1.550” O.D. Roller Dual Valve Spring with dampner, 140 lbs. on seat, 365 lbs open #8016
10º 4140 Chrome Moly Retainers #8510
10º Valve Locks #9005
Guide Plates #6109
Valve Seals #6611
Hardened Shims #8045
Intake Valve Seats #9062
Exhaust Valve Seats #9064
Bronze Valve Guides Intake #9045
Bronze Valve Guides Exhaust #9046
AFR BB Chevy 7/16 Exhaust Stud #6406
AFR BB Chevy 7/16 Intake Stud #6407
All Accessory Holes are Predrilled & Tapped!
Specifications, Features, and Supporting Components:
Head Torque 75 Ft. Lbs.
Intake Port Volume (as cast) N/A
Intake Port Gasket Fel-Pro# 1212, AFR# 6857
Intake Valve Size 2.250 AFR# 7620
Exhaust Port Volume (as cast) N/A
Exhaust Port Gasket AFR #6858
Exhaust Valve Size 1.880 AFR# 7630
4.540 Bore Fel Pro #1017, AFR #6850
Head Bolts & Studs Standard ARP, AFR #6308 & #6307
Head Bolt Washers Manley, AFR #6320
Suggested Manifold Victor Jr, RPM Performer, or Weiand Stealth
Spark Plug Starting Range Autolite 3935
Combustion Chambers 121cc
Spring Pocket can be cut to 1.750, no deeper.
Stud Girdle AFR# 6210
Valve Spacing Standard
Rocker Arms Standard
Valve Angle 24º/4º Intake 15º/4º Exhaust
Angle Mill 102cc Maximum .009/cc
Flat Mill 114cc Maximum .006/cc
Note: Milling head deck will affect flow numbers
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View the rest of our catalog:
Full Catalog
Please contact us with any questions:
2587 Dos Lomas
Fallbrook, Ca 92028
(760) 586-5617
Email: sales@TREperformance.com
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