12 Days of Christmas
1-800-345-4545
FREE SHIPPING!
Orders Over $95
Same Day Shipping Before 11 PM ET
0
My Cart
$0.00
Shop By Vehicle
Shop By
Category
All Categories

Rebates
Gift Certificates
My Account
E-Mail Signup
Catalog Request
Help

AFR - Airflow Research 1137

245cc Eliminator NPP Race Aluminum Cylinder Heads Small Block Chevy

AFR - Airflow Research 1137
Representative Image
Product images may differ from actual product appearance.

033-1137

jegs shipping
FREE Shipping
$2,448.23
AFR - Airflow Research 1137 245cc Eliminator NPP Race Aluminum Cylinder Heads Small Block Chevy $2,448.23
To order this item contact Customer Service at 1-800-345-4545.
245cc Eliminator NPP Race Aluminum Cylinder Heads
  • Small Block Chevy
  • Competition Package CNC Porting
  • 70cc Combustion Chambers
  • Standard Exhaust Port Configuration
  • Angle Spark Plug
  • Assembled
  • Sold in Pairs, 2/pkg.

  • AFR - Airflow Research 1137 Details

    Competition Package CNC Porting Eliminator Heads

  • Standard Exhaust Port Configuration

    Small Block Chevy 245cc Eliminator Race Basic Package Components
    100% CNC Ported Combustion Chambers
    100% CNC Ported Exhaust Ports
    100% CNC Ported Intake Ports
    Competition 5-Angle Valve Job
    Intake Valve, 2.125'' x 5.006'' o.a.l.
    Exhaust Valve, 1.600'' x 5.024'' o.a.l.
    1.550'' OD Solid Roller Dual Valve Spring, 250 lbs. on seat, .800'' maximum lift, max RPM 8300-8500
    10º Manley 4140 Chrome Moly Retainers
    10º Valve Locks
    Viton Valve Seals
    Hardened Spring Cups
    Intake Valve Seats
    Exhaust Valve Seats
    Bronze Valve Guides
    Small Block Chevy 245cc Eliminator Race Head Specifications
    Head Torque w/Moly Lube 65-70 Ft. Lbs.
    Rocker Stud Torque 55 Ft. Lbs.
    Intake Port Gasket, 1.310'' x 2.180'' w/ 3/8'' radius Fel-Pro 375-1206 - DO NOT PORT MATCH Intake Manifold to Fel-Pro Gasket.
    Exhaust Port Gasket Fel Pro 375-1405
    Head Gasket 350ci Fel Pro 375-1004
    400ci Fel Pro 375-1014
    Head Bolts & Studs Standard ARP
    Head Bolt Washers Manley Standard
    Suggested Manifold AFR p/n 033-4801, AFR p/n 033-4802 or Edelbrock Vic Jr p/n 350-2975 or Super Victor p/n 350-2925
    Spark Plug Starting Range Autolite 3910
    Combustion Chambers 70cc
    Intake Port 245cc
    Exhaust Port 80cc+
    Spring Pocket can be cut to 1.680, no deeper.
    Valve Spacing 60/40
    Shaft Mount Rocker Arms T&D .450'' Offset w/.180'' Offset Lifter - T&D .550'' Offset w/Standard Lifter
    Valve Angle 23°
    Angle Mill .008'' per cc
    Flat Mill .006'' per cc
    NOTE: Flat and Angle mills might require a .120'' thick head gasket.

  • Specifications:

    Manufacturer's Part Number:
    1137

    AFR's Largest and Most Powerful
    SB-Chevy 60/40 Head

    AFR is proud to introduce their new 245cc NPP (no pushrod pinch) cylinder head that's best suited for max effort applications, but larger displacement 427+ pump gas engines could consider this head as well. This exciting product represents AFR's best flowing 23° Small Block Chevy head to date and while flow numbers may reflect a very good 18° head of the past, this head is still a conventional direct bolt on non-raised runner intake port configuration. It will drop on your 23° short block as easily as the 227cc or 235cc small block head. And, in fact, it shares indentical valve centerlines and rocker stud locations to both of those heads. However, unlike the 227cc and 235cc heads, this product will not accept stud mount style rockers. A shaft mount rocker system with a .180'' offset intake lifter is required. Larger diameter 3/8'' pushrods fit without additional clearancing. This is primarily due to the fact that they enlarged and widened the pushrod pinch removing that check point in the entrance of the intake allowing them to design a port with a more direct shot at the back of the valve. That also has a more consistent cross sectional area and velocity profile. In addition, this head comes standard with a 3/4'' inch deck, 2.125'' intake and 1.600'' exhaust Valves. The exhaust port and bolt pattern are raised .250'' (1/4'') over GM L98 head, this rarely affects header or chassis fitment. If you are unsure if this is the right AFR head for you, we encourage you to contact us directly to discuss your combination. These 245cc aluminum cyilnder heads are standard port configuration only. Spread port exhaust configuration not available. Made in USA.

    245cc Eliminator Race Cylinder Head Features:
  • 100% CNC Ported Combustion Chambers
  • 100% CNC Ported Exhaust Ports
  • 100% CNC Ported Intake Ports
  • Competition 5-angle Valve Job
  • 245cc Intake Ports
  • 80cc+ Exhaust Ports
  • Bead Lock Intake Valve, 2.125'' x 5.006'' Overall Valve Length
  • Bead Lock Exhaust Valve, 1.600'' x 5.024'' Overall Valve Length
  • PAC Racing Valve Spring: 1.550'' OD Solid Roller Dual Valve Spring, 250 lbs on seat, .800'' maximum lift, Max RPM 8300-8500
  • 10° Retainers
  • 10° Bead Lock Valve Keepers
  • Viton Valve Seals
  • Hardened Spring Cup
  • Intake Valve Seats
  • Exhaust Valve Seats
  • Bronze Valve Guides
  • Standard Exhaust Bolt Pattern

  • Items You Need