AFR 2020-TI Big Block Chevy Magnum Comp, 385cc/121cc Aluminum Cylinder Head, Assembled, Pair

$4,851.16
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SKU:
AFR2020-TI
MPN:
2020-TI
Condition:
New
Weight:
88.95 LBS
Shipping:
Calculated at Checkout

Applies To Continental U.S. orders only

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The 385cc heads are AFRƒ??s largest and best flowing BBC heads! They feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings, Titanium retainers, and high quality components throughout. These heads are best suited for large displacement (540+) high RPM Big Block Chevrolet racing engines.

Cylinder Head Style:
Assembled
Cylinder Head Material:
Cast aluminum
Cylinder Head Finish:
Natural
CNC-Machined Combustion Chamber:
Yes
Combustion Chamber Volume (cc):
121cc
Combustion Chamber Style:
Heart
CNC-Machined Intake Runner:
Yes
Intake Runner Volume (cc):
385cc
Intake Port Shape:
Rectangular
Intake Port Location:
Standard
Intake Valve Angle:
24/4 degree
CNC-Machined Exhaust Runner:
Yes
Exhaust Runner Volume (cc):
135cc
Exhaust Port Shape:
Square
Exhaust Port Location:
Standard
Exhaust Valve Angle:
15/4 degree
Intake Valves Included:
Yes
Intake Valve Diameter (in.):
2.350 in.
Exhaust Valves Included:
Yes
Exhaust Valve Diameter (in.):
1.880 in.
Valve Type:
Stainless
Maximum Valve Lift (in.):
0.850 in.
Valve Springs Included:
Yes
Valve Spring Type:
Dual W/Damper
Outside Diameter of Outer Spring (in.):
1.625 in.
Valve Guides Included:
Yes
Valve Guide Material:
Bronze
Valve Seats Machined:
Yes
Valve Seat Material:
Ductile iron
Valve Seat Machine Style:
5-angle
Retainers Included:
Yes
Retainer Material:
Titanium
Valve Stem Seals Included:
Yes
Valve Stem Seal Style:
Viton Positive stop
Locks Included:
Yes
Lock Style:
10 degree chromoly
Camshaft Style:
Solid roller
Spark Plug Style:
Angled
Guideplates Included:
Yes
Guideplate Pushrod Size:
3/8 in.
Rocker Arm Studs Included:
Yes
Rocker Arm Nut Thread Size:
7/16-20 in.
Accessory Bolt Holes Drilled:
Yes
Valve Cover Mounting Style:
Perimeter bolt
Heat Crossover:
No
Steam Holes Drilled:
No
Oiling Style:
Through pushrod
Machined for O-Ring:
No
Quantity:
Sold as a pair.
Notes:
Best suited for large displacement high rpm engine applications. Valve Spring Pressure, 275 lbs closed. Spark Plug Type 14mm Spark Plug, .750 Reach
Make:
Chevrolet
Engine Family:
Chevy big block Mark IV
Engine Sizes:
6.5L/396-7.4L/454
Years:
1966-1990
Engine Family:
Chevy big block Gen V
Years:
1991-1995
Engine Family:
Chevy big block Gen VI
Years:
1996-2000
Engine Sizes:
7.4L/454