AFR 3640 BBC 290/112CC .725 LIFT COMPLETE LOWEST PRICE ON EVERY PART NUMBER MADE
CALL SHANON AT 507 445 3235 WITH ANY QUESTIONS. Our medium sized 290cc oval port cylinder head is recommended for moderate street or street/strip big block chevys with displacements up to 509 cubic inches, operating at or below 6500 RPM. Features 100% CNC machined intake runners , exhaust ports and combustion chambers; capable of flowing 375 CFM at 0.700" of lift. 290cc Aluminum BBC Cylinder Heads Part # Description Combustion Chamber 3640 Fully CNC Ported - Hydraulic Roller 112cc 3650 Fully CNC Ported - Solid Roller 112cc Click part # to add product to your cart 290cc BBC .200 .300 .400 .500 .550 .600 .650 .700 Int 163 235 289 330 346 360 368 375 Exh 135 180 230 262 271 278 286 292 Test conducted at 28" of water (pressure) on Superflow 600Bore Size: 4.310", 3/4" radius plate exhaust, 1 7/8" curved pipe 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, 2.250" x 5.500" O.A.L 7620 11/32" Nail Head Exhaust Valve, 1.880" x 5.450" Overall Valve Length 7630 PAC Racing Springs#1940 1.550" O.D. Hydraulic Roller Dual Valve Spring, 175 lbs. on seat, .725" maximum lift, 473lbs @ .600 lift, Max RPM 6500-6700 8002 PAC Racing Spring 1.550 O.D. Solid Roller Valve Spring, 220lbs on seat, .710" Maximum Lift, Max RPM 7200-7400 (upgrades available) 8000 Manley 10° Steel Retainers 1.500" O.D x 1.120"I.D x .705" I.D 8511 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 #6610 Hardened Valve Spring I.D Locator 1.550" O.D x .780" I.D 8048 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 290cc Intake Port Dimension 2.030"H x 1.830"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 2.895 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.