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Airflow Research 2100 305cc Magnum Big Block Chevy Aluminum Cylinder Heads

Manufacturer

Picture for manufacturer Airflow Research

Part Number

2100
10 reviews
Sale Price

$3,538.27

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Usually delivered within 2 days

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Product Details

The Airflow Research 2100 Magnum cylinder heads are high-performance aluminum cylinder heads engineered for Big Block Chevy applications. These 305cc rectangle port heads deliver exceptional airflow while optimizing low and mid-lift performance, making them ideal for street-driven and marine engines ranging from 396 to 555 cubic inches.

Key Specifications:

  • 305cc intake runner volume with 124cc exhaust runner volume
  • 117cc combustion chamber (standard)
  • Rectangle port, 24-degree valve angle design
  • Cast aluminum construction with partially CNC ported intake and exhaust ports, CNC bowl blend
  • Premium one-piece stainless steel valves: 2.250" intake, 1.880" exhaust
  • 3/4" thick reinforced head deck with reinforced rocker stud bosses
  • Competition 5-angle valve job with ductile iron valve seats

Performance Features:

  • Assembled and ready to install with complete valve train components
  • 1.550" OD roller dual valve springs with damper: 240 lbs seat pressure, 0.750" maximum lift
  • Bronze valve guides, hardened shims, and valve seals included
  • 7/16" intake and exhaust rocker studs with guide plates
  • Optimized for 2,500-6,800 RPM operating range
  • Sold as a pair (two cylinder heads per package)

Installation Notes:

  • Optional stud girdle required for two-degree rolled valve angles
  • Requires 1" longer head bolts on four bottom exhaust bolt holes
  • Intake port gasket: 1.700" x 2.430" with 1/2" radius
  • Head torque specification: 75 ft-lbs

These AFR Magnum heads are engineered to deliver strong low-RPM torque and impressive peak flow numbers, making them an excellent choice for moderate street performance, street/strip applications, and marine engines where drivability and power are essential.

Products specifications

Accessory Bolt Holes Drilled

Yes

Calculator

Compression Calculator

CNC-Machined Combustion Chamber

Yes

CNC-Machined Exhaust Runner

Yes

CNC-Machined Intake Runner

Yes

Combustion Chamber Style

Heart

Combustion Chamber Volume (cc)

119

Cylinder Head Finish

Natural

Cylinder Head Material

Aluminum

Cylinder Head Style

Assembled

Damper Spring Included

Yes

Exhaust Port Shape

Round

Exhaust Runner Volume (cc)

124cc

Exhaust Valve Angle

15/4

Exhaust Valve Diameter (in)

1.880 in.

Exhaust Valves Included

Yes

Guideplates Included

Yes

Heat Crossover

No

Intake Port Location

Standard

Intake Port Shape

Rectangular

Intake Runner Volume (cc)

305cc

Intake Valve Angle

24/4

Intake Valve Diameter (in)

2.250 in.

Intake Valves Included

Yes

Lock Style

10 degree

Locks Included

Yes

Machined for O-Ring

No

Maximum Valve Lift (in)

0.750 in.

Notes

Cast heads feature a CNC bowl blend but are not fully CNC ported. 1 in. longer head bolts required on the four bottom exhaust bolt holes and are race ported.

Number of Springs Per Valve

Dual

Oiling Style

Through pushrod

Outside Diameter of Outer Spring (in)

1.625 in.

Quantity

Sold as a pair.

Retainer Material

Chromemoly steel

Retainers Included

Yes

Rocker Arm Nut Thread Size

7/16-20 in.

Rocker Arm Nuts Included

No

Rocker Arm Studs Included

Yes

Rocker Arms Included

No

Steam Holes Drilled

No

Valve Cover Mounting Style

Perimeter bolt

Valve Guide Material

Bronze

Valve Seat Machine Style

5-angle

Valve Seat Material

Ductile iron

Valve Seats Machined

Yes

I haven't received my parts yet, but they just notified me that the order has been shipped. I think this is very fast service. Their online ordering system was very easy to use. And best of all, they had the lowest prices on the items I ordered. Even the shipping charge was less than some other companies. So far, I am very satisfied with Autoplicity, and I will certainly check their Website the next time I'm looking for parts.

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Autoplicity has the best prices and customer service. The online chat is a great function to get more information about an item. Also they had an item in stock that I couldn't find anywhere else.

Fast, Professional and great prices.

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Autoplicity has really good service. They give you such good prices and yet they're still willing to give you discounts on your purchases. They emailed me a day later after purchase with shipping number. I would recommend them to anyone!

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