Dart 126121 SBC SHP Aluminum Head 180cc/64cc, Straight Plug, 2.02/1.6 Valve, Assembled, Each
$$730.44Engine \ Cylinder Heads \ Chevy Small Block Aluminum Heads126121
DAT126121
Dart 126121 SBC SHP Aluminum Head 180cc/64cc, Straight Plug, 2.02/1.6 Valve, Assembled, Each
Excellent street, strip, oval track, truck or marine performance upgrade. Maximum torque and throttle response from idle to 6,000 RPM. Best for 327-400 cubic inch engines. Works with most standard components.   Dart’s SHP (Special High Performance) 23° 180cc cylinder heads provide an affordable option to those looking for the weight ...
Dart126121 SBC SHP Aluminum Head 180cc/64cc, Straight

Dart

Dart 126121 SBC SHP Aluminum Head 180cc/64cc, Straight Plug, 2.02/1.6 Valve, Assembled, Each

$730.44

Item #: DAT126121

Mfg Part #: 126121

Applies To Continental U.S. orders only

Out Of Stock

Specifications
Cylinder Head Specifications
Cylinder Head Style
Assembled
Cylinder Head Material
Aluminum
Intake Port Shape
Rectangular
Intake Valve Diameter (in)
2.020 in.
Cylinder Head Finish
Natural
Combustion Chamber Volume (cc)
64
CNC-Machined Combustion Chamber
No
Intake Runner Volume (cc)
180cc
Exhaust Runner Volume (cc)
70cc
CNC-Machined Intake Runner
No
CNC-Machined Exhaust Runner
No
Combustion Chamber Style
Heart
Intake Port Location
Standard
Exhaust Port Shape
Square
Exhaust Port Location
Standard
Spark Plug Style
Straight
Intake Valves Included
Yes
Exhaust Valves Included
Yes
Exhaust Valve Diameter (in)
1.600 in.
Valve Springs Included
Yes
Maximum Valve Lift (in)
0.510 in.
Outside Diameter of Outer Spring (in)
1.250 in.
Damper Spring Included
No
Number of Springs Per Valve
Single
Retainers Included
Yes
Retainer Material
Steel
Locks Included
Yes
Lock Style
7 degree
Valve Stem Seals Included
Yes
Valve Stem Seal Style
Positive stop
Rocker Arm Studs Included
Yes
Rocker Arm Nut Thread Size
3/8-24 in.
Rocker Arms Included
No
Rocker Arm Nuts Included
No
Guideplates Included
Yes
Guideplate Pushrod Size
5/16 in.
Valve Cover Mounting Style
Perimeter bolt
Accessory Bolt Holes Drilled
Yes
Intake Valve Angle
23
Exhaust Valve Angle
23
Valve Guides Included
Yes
Valve Guide Material
Manganese bronze
Valve Seats Machined
Yes
Valve Seat Machine Style
N/A
Valve Seat Material
Powdered metal
Steam Holes Drilled
No
Oiling Style
Through pushrod
Machined for O-Ring
No
Heat Crossover
No
Camshaft Style
Hydraulic flat tappet
Quantity
Sold individually.
Applications
Make
Chevrolet
Engine Family
Chevy small block Gen I
Engine Size
5.4L/327-6.6L/400
Years
1962-1986
General
Brand
Dart
Item #
DAT126121
Mfg Part #
126121
Description

Excellent street, strip, oval track, truck or marine performance upgrade. Maximum torque and throttle response from idle to 6,000 RPM. Best for 327-400 cubic inch engines. Works with most standard components.

 

Dart’s SHP (Special High Performance) 23° 180cc cylinder heads provide an affordable option to those looking for the weight savings of an Aluminum head for a street performance engine. The SHP is designed to work with most off the shelf components.

 

The SHP head’s precision cast ports are designed to offer excellent flow and power without the need for CNC porting. Optimized chambers increase combustion efficiency, and multi-angle intake seats and radiused exhaust seats dramatically increase performance.  Manganese Bronze valve guides increase the life of the head.

  • A356-T6 aluminum alloy
  • Bolt on compatibility & allow use of off the shelf pistons & valvetrain components
  • Featuring optimized chambers for increased combution efficiency
  • Muti-angle intake seats
  • The cylinder heads radiused exhaust seats dramatically increase performance
  • Hardened exhaust seats are compatible with unleaded gasoline
  • The manganese bronze valve guides extend cylinder head life
  • Machined for 1.250" or 1.437" diameter valve springs
  • Straight spark plug configuration
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