AFR 2100 BBC 305/117CC .725/.850 COMPLETE WITH HYDRAULIC OR SOLID ROLLER SPRINGS

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 Click part # to add product to your cart 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 600Bore 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.