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Edelbrock 61989

Pro-Port Cylinder Heads for LS1 Gen III

Edelbrock 61989

350-61989

made in usa
jegs shipping
FREE Shipping
Ships 12/22/16 if Ordered Today
Edelbrock 61989 Pro-Port Cylinder Heads for LS1 Gen III $945.82
LS1 Gen III Pro-Port Cylinder Head
  • Semi-Finished
  • Cathedral Port
  • 38cc Combustion Chamber
  • Intake Port Entry: 0.82" x 2.80"
  • Exhaust Port Exit: 1.41" x 1.02"
  • Valve Size: 2.08" Intake/1.64" Exhaust
  • Sold Each

  • Edelbrock 61989 Details

    LS1 GEN III

    A bare, unported version of the our popular head that fits 1997 & later GM Gen III small-block engines from 4.8L to 6.0L.



    Combustion Chamber Size:38cc (Unfinished Size)
    Intake Port Entry:0.82'' x 2.80''
    Exhaust Port Exit:1.41'' x 1.02''
    Valve Sizes:2.08'' Intake / 1.64'' Exhaust (These are the maximum allowable size for each valve; these maximum sizes may not be used together)
    Valve Pierce Points (X, Y):0.820'', 0.010'' Intake
    -1.090'', 0.010'' Exhaust
    Coordinates provided are cylinders 1, 3, 6, 8.
    Invert ''X'' value for cylinders 2, 4, 5, 7.
    Valve Spacing:1.910''
    Valve Guides:Included
    Valve Seats:Installed
    Valve Angle:15°
    HIP Processed:No

    Specifications:

    Type
    Bare
    Usage
    Competition
    Emission
    Non-Emissions
    Engine Make/Size
    Chevy Small Block LS1
    Cylinder Head Type
    Standard
    Preparation
    Requires Professional Preparation (Bare)
    Finish
    Cast Aluminum
    Accessory Bolt Holes Drilled
    Yes
    CNC-Machined Combustion Chamber
    No
    CNC-Machined Exhaust Runner
    No
    CNC-Machined Intake Runner
    No
    Combustion Chamber Style
    Double quench
    Combustion Chamber Volume (cc)
    38
    Cylinder Head Finish
    Natural
    Cylinder Head Material
    Aluminum
    Cylinder Head Style
    Bare
    Damper Spring Included
    No
    Exhaust Port Location
    Standard
    Exhaust Valves Included
    No
    Guideplates Included
    No
    Heat Crossover
    No
    Intake Port Location
    Standard
    Intake Port Shape
    Cathedral
    Intake Valve Angle
    15
    Intake Valves Included
    No
    Locks Included
    No
    Machined for O-Ring
    No
    Oiling Style
    Through pushrod
    Quantity
    Sold individually
    Retainers Included
    No
    Rocker Arm Nuts Included
    No
    Rocker Arm Studs Included
    No
    Rocker Arms Included
    No
    Spark Plug Style
    Angled
    Steam Holes Drilled
    No
    Valve Cover Mounting Style
    Centerbolt
    Valve Guide Material
    Manganese bronze
    Valve Guides Included
    Yes
    Valve Seat Material
    Ductile iron
    Valve Seats Machined
    No
    Valve Springs Included
    No
    Valve Stem Seals Included
    No
    Manufacturer's Part Number:
    61989

    The Foundation for an LS Powerhouse!

    These unported versions of race-winning Edelbrock Victor Series CNC heads are designed specifically for the professional cylinder head porter and engine builder.

    Like all other Edelbrock Cylinder heads, Pro-Port cylinder heads are also cast in the USA at the state-of-the-art Edelbrock Foundry with extra-thick walls to allow for custom CNC porting. In most cases, seats and manganese-bronze valve guides are included, but not installed. Made In The USA!


    Please note: These heads can not be used without professional head preparation.


    LS1 Gen III Chevy
    LS1 PRO-PORT RAW (15° VALVE ANGLE)
    A bare, unported version of the our popular head that fits 1997 & later GM Gen III small-block engines from 4.8L to 6.0L.



    Victor Jr. LS Pro-Port Raw
    FOR GM GEN III & IV SERIES LS3, LS7, and LSX ENGINES
    These heads provide head porters with the extra material needed in the ports and combustion chamber for greater flexibility when developing CNC port programs, allowing engine builders to take full advantage of GM's LS series potential. Both LS3 and LS7 versions retain the stock valve location, valve angle, intake flange and accessory bolts locations. They feature a 5/8'' deck and come with seats and guides installed. LS3 Pro-Port heads are 3/4'' taller than stock and have raised spring pads requiring longer valves. Victor Jr. LS3 Pro-Port cylinder head p/n 350-77339 and Victor Jr. LS7 Pro-Port cylinder head p/n 350-77369 are machined to work with standard GM LS blocks. Victor Jr. LS3 Pro-Port p/n 350-77349 and Victor Jr. LS7 Pro-Port cylinder head p/n 350-77379 have the extra head bolt provisions required for use with GM LSX blocks.



    LS-R Pro-Port Raw
    FOR GM GEN III & IV LS SERIES ENGINES
    This head is designed to maximize the potential of GM's race oriented LSX block. It is also compatible with all previous versions of the engine. The true canted valve design offers the utmost in port flow and combustion efficiency possible with a two valve design. The head uses the GM SB2 valve cover footprint required by the added width of the canted valve layout. The stock exhaust bolt pattern is retained. Like all Edelbrock Pro-Port Raw heads, they will require professional preparation, including CNC porting to the port design of choice. Valve guides are included but not installed. This head has been HIP processed to increase density and provide the heads with extreme durability.



    HIP Process HIGH-TECH PROCESS DELIVERS STRONGER CASTINGS
    Heads are available with a technique called Hot Isostatic Pressing (HIP). This aerospace process takes raw castings up to 900° F in a pressurized chamber (up to 30,000 psi) and compresses the casting. The results: an incredibly strong, super dense sand casting that has three times the fatigue life and nearly the consistency of billet aluminum.

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