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| NEW AFR 4.8L/5.3L Small Bore 214cc Aluminum Cylinder Heads | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
This auction is for
a pair of Brand New AFR’s 214cc LS cylinder head package goes beyond a traditional upgrade. Complete Precision Street CNC porting works to create a smoother, more efficient airflow path from intake to valve, improving cylinder fill, combustion efficiency, and overall engine response. The result is a strong, usable mid-range and stable, repeatable top-end performance up to 6,500 RPM, making this package ideal for street, street/strip, and towing applications.
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| 214cc 4.8L/5.3L Small Bore Street Head Flow Chart | ||||||
| .200 | .300 | .400 | .500 | .550 | .600 | |
| Int | 156 | 206 | 237 | 271 | 283 | 293 |
| Exh | 119 | 160 | 192 | 214 | 219 | 225 |
Test conducted at 28" of water (pressure) on Superflow 600
Bore Size: 4.060", 3/4" radius plate exhaust, 1 3/4" curved pipe
| Basic Package Components | Part # |
| 100% CNC Ported Combustion Chambers 100% CNC Ported Exhaust Ports 100% CNC Ported Intake Ports Competition 5-angle Valve Job |
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| 8mm LSx 2.000 OD Int Valve - 4.900" OAL, For Small bore 5.3L engines | AFR #7236 |
| 8mm LSx 1.570 Exh Valve - 4.915" OAL, For Small bore 5.3L engines | AFR #7235 |
| Pacaloy Hydraulic Roller Spring 1.290 O.D., Premium Grade Chrome Silicon | AFR #8017 |
| Steel 7 degree Retainer 1.245 OD x .880 ID x .655 ID | AFR #8514 |
| 7° Bead Lock Valve Keepers | AFR #9007* |
| Viton Valve Seals .600" O.D x .495" I.D | AFR #6612 |
| Hardened Valve Spring O.D Locator 1.380" O.D x .570" I.D | AFR #8042 |
| Specifications, Features, and Optional Supporting Components |
| Head Material |
A356 Aluminum |
| Intake Port Volume |
214cc |
| Valve Spring Type | .600 Max Lift Hydraulic Roller |
| Intake Port Dimension | 3.275"H x 1.120"W x5/16 top 3/8 bottom |
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Intake Port Location
|
Stock |
| Exhaust Port Volume | 90.2cc |
| Exhaust Port Dimension | 1.415" H x 1.710" W |
| Exhaust Port Location |
Stock |
| Combustion Chamber Size |
65cc |
| Valve Cover Bolt Pattern |
Center Bolt |
| Valve Angle | 15° |
| Valve Spring Pocket Diameter | 1.510" O.D |
| Max Valve Spring Pocket Machining | 1.525" O.D |
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Deck Thickness
|
.750" |
| Minimum Bore Diameter | 3.780" |
| Spark Plug Dimensions |
14mm x .750" w/Tapered seat |
| Head Gasket | Cometic 3.930 Bore Size |
| Intake Port Gasket |
GM or Cometic |
| Exhaust Port Gasket |
GM#12558573 |
| Head Bolts (97-03) |
AFR #6330 |
| Head Studs (97-03) |
AFR #6331 |
| Head Bolts (04+) |
AFR #6334 |
| Head Studs (04+) |
AFR #6335 |
| Head Bolt Washers, Manley |
AFR #6320 |
| Suggested Manifold |
FAST 90mm, 92mm, or 102mm |
| Spark Plug Starting Range | NGK TR55 |