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Founder, 1929-2014
Speedy Bill
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Products

Harmonic Balancers

Harmonic Balancers

Your harmonic balancer connects to your crankshaft and it's job is to reduce torsional vibration and serve as a pully for drive belts. Without this damper, crankshaft failure is imminent. Take care of your crank with a quality harmonic balancer from Speedway Motors. We carry the top brands like Enginequest, Fluidampr and Professional Products to make sure you get the best parts and with Speedway Motors, you know you'll be getting the best price too.

Featured Products
  • Professional Products 80010 Chevy 350 Lightweight Balancer, 6 Inch
    Professional Products 80010 Chevy 350 Lightweight Balancer, 6 Inch
    (Part #91015363)
    x
                

    This 6" harmonic balancer fits 350 c.i. Small Block Chevys and only weighs 5.1 lbs. Plus, the balancing cut out is on the backside so they can't tell what crank you're running. Damper is a press-on fit.

    • For internally balanced engines
    • Durable nodular iron construction
    • High temperature elastomer bond
    • Engraved timing marks every 90° 
    • Includes 60° of easy-to-read timing marks 
    • Rated to 10,000 RPM
    • NOT SFI approved

    910-15363 Instructions (PDF) 

    Technical Notes (PDF) 

  • Small Block Chevy Harmonic Balancer, 6-3/4 Inch, Black
    Small Block Chevy Harmonic Balancer, 6-3/4 Inch, Black
    (Part #91015358)
    x
                

    Small block Chevy stock-type replacement 6-3/4" diameter harmonic balancer. For internal balance engines.

    • NOT recommended for RPM's in excess of 6500
    • NOT SFI certified
    • Internal balance
  • Speedway Small Block Chevy 350 Fluid Crank Damper, 6.25 Inch
    Speedway Small Block Chevy 350 Fluid Crank Damper, 6.25 Inch
    (Part #91015342)
    x
                

    Balancer for Small Block Chevy 350 c.i. V-8. Degreed from 10o ATDC to 50o BTDC.  SFI 18.1 certified.

  • Chevy 383-400 Lightweight Balancer, 6-3/4 Inch
    Chevy 383-400 Lightweight Balancer, 6-3/4 Inch
    (Part #91015364)
    x
                

    This 6-3/4" balancer fits 383/400 c.i. Small Block Chevys and only weighs 7-3/4 lbs. Plus, the balancing cut out is on the backside so they can't tell what crank you're running. Damper is a press-on fit.

    • Durable nodular iron construction
    • High temperature elastomer bond
    • This balancer is 1.20" thick
    • Rated to 6,500 RPM
    • NOT SFI approved 
  • Professional Products Small Block Ford Harmonic Balancers
    Professional Products Small Block Ford Harmonic Balancers
    (Part #91015365)
    x
                

    These PowerForce series balancers from Professional Products are available in 28 oz. or 50 oz. balance. They both measure 6.4" in diameter, are 3" in total length, and are marked to 40 degrees at three locations. Plus, they feature both 3 and 4 bolt pulley holes, which allows the use of late model serpentine drive systems on early engines if desired. Counter weight is removable for zero balanced cranks. Fits most 260/289/302/351W/5.0L Ford engines.  6500 RPM max limit.

    See Notes tab for spacer requirements.

    28 oz. Balancer (S/B Ford V8 1963-80)

    • Matches O.D. and thickness of the stock early (1963-69) dampers
    • Counterbalance weight matches the stock 28 ounce inches
    • Overall balance specifications are held tighter than the original O.E. tolerances
    • Dual Bolt Pattern - both the "early" 3-bolt and the "late" 4-bolt patterns
    • Removeable Counterweight - if building a neutral balance engine simply remove the bolt-in counterweight on the back of the damper

    50 oz. Balancer (S/B Ford V8 1981-95)

    • Made to the early short length of 3" - allows the use of a late 5.0L engine with a 50 oz. in. damper to be used in an early chassis where front clearance is at a minimum
    • To fit in late vehicles, use spacers to provide the correct front pulley alignment
    • Dual Bolt Pattern - both the "early" 3-bolt and the "late" 4-bolt patterns
    • Plastic insert shown in photos can be used to center 3-bolt pulleys with a female pilot, or it can be removed to accept 3-bolt pulleys with a male pilot
    • Very versatile and can be used on many different Ford engines

    Harmonic Balancer Technical Notes (PDF)

    910-15365 Instructions (PDF)

  • Chevy 350 Harmonic Balancer, 8 Inch, Plain Steel
    Chevy 350 Harmonic Balancer, 8 Inch, Plain Steel
    (Part #91015357)
    x
                

    Small block Chevy 350 c.i. V-8 stock-type replacement 8" harmonic balancers. Internal balanced. Dampers are designed for press fit.

    • Ring and hub are bonded (vulcanized) to the elastomer
    • Surpasses the reliability and strength of OEM
    • NOT SFI-Approved
  • Professional Products Small Block Chevy 6 Inch Harmonic Balancer, SFI
    Professional Products Small Block Chevy 6 Inch Harmonic Balancer, SFI
    (Part #91090010)
    x
                

    This is a SFI certified 6" internally balanced Small Block Chevy harmonic balancer. It has 60 timing marks plus engraved marks every 90 degrees.

    • 18.1 SFI Rating
    • Steel
    • Painted
    • Sold Individually 

     

  • Speedway Chrome SB Chevy 350 Fluid Crank Damper, 6.25 Inch
    Speedway Chrome SB Chevy 350 Fluid Crank Damper, 6.25 Inch
    (Part #91015330)
    x
                

    Chrome plated steel balancer for S/B Chevy 350 c.i. V-8. Degreed from 10° ATDC to 50° BTDC. SFI serial number and timing marks are etched on the outer ring.

    • Forged from 1025 low carbon steel  
    • Injected with high viscosity silicone fluid
    • Rated to 12,500 RPM
    • SFI 18.1 certified

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  • Speedway Small Block Chevy 350 Fluid Crank Damper, 6.25 Inch
    Speedway Small Block Chevy 350 Fluid Crank Damper, 6.25 Inch
    (Part #91015342)
    x
                

    Balancer for Small Block Chevy 350 c.i. V-8. Degreed from 10o ATDC to 50o BTDC.  SFI 18.1 certified.

  • Professional Products Small Block Ford Harmonic Balancers
    Professional Products Small Block Ford Harmonic Balancers
    (Part #91015365)
    x
                Please view the product's page for more information
            
  • Chevy 383-400 Lightweight Balancer, 6-3/4 Inch
    Chevy 383-400 Lightweight Balancer, 6-3/4 Inch
    (Part #91015364)
    x
                

    This 6-3/4" balancer fits 383/400 c.i. Small Block Chevys and only weighs 7-3/4 lbs. Plus, the balancing cut out is on the backside so they can't tell what crank you're running. Damper is a press-on fit.

    • Durable nodular iron construction
    • High temperature elastomer bond
    • This balancer is 1.20" thick
    • Rated to 6,500 RPM
    • NOT SFI approved 
  • 1981-95 Ford 302 Chrome Balancer, 50 Oz., 6.40 Inch O.D.
    1981-95 Ford 302 Chrome Balancer, 50 Oz., 6.40 Inch O.D.
    (Part #57530212)
    x
                

    Chrome harmonic balancer for 1981-1995 Late Model Ford 5.0L/302/H.O. small block engines.

    • 50 oz. counter balance
    • 6.405" O.D.
    • Chrome finish
  • Professional Products Small Block Chevy 6 Inch Harmonic Balancer, SFI
    Professional Products Small Block Chevy 6 Inch Harmonic Balancer, SFI
    (Part #91090010)
    x
                

    This is a SFI certified 6" internally balanced Small Block Chevy harmonic balancer. It has 60 timing marks plus engraved marks every 90 degrees.

    • 18.1 SFI Rating
    • Steel
    • Painted
    • Sold Individually 

     

  • Small Block Chevy 400 Harmonic Balancer, 8 Inch, Plain Steel
    Small Block Chevy 400 Harmonic Balancer, 8 Inch, Plain Steel
    (Part #91015400)
    x
                

    Small block Chevy 400 c.i. V-8 stock-type replacement 8" harmonic balancers. External Balanced. Dampers are designed for press fit.

    • Ring and hub are bonded (vulcanized) to the elastomer
    • Surpasses the reliability and strength of OEM
    • NOT SFI-Approved
  • Professional Products 80010 Chevy 350 Lightweight Balancer, 6 Inch
    Professional Products 80010 Chevy 350 Lightweight Balancer, 6 Inch
    (Part #91015363)
    x
                

    This 6" harmonic balancer fits 350 c.i. Small Block Chevys and only weighs 5.1 lbs. Plus, the balancing cut out is on the backside so they can't tell what crank you're running. Damper is a press-on fit.

    • For internally balanced engines
    • Durable nodular iron construction
    • High temperature elastomer bond
    • Engraved timing marks every 90° 
    • Includes 60° of easy-to-read timing marks 
    • Rated to 10,000 RPM
    • NOT SFI approved

    910-15363 Instructions (PDF) 

    Technical Notes (PDF) 

  • Small Block Chevy Harmonic Balancer, 6-3/4 Inch, Black
    Small Block Chevy Harmonic Balancer, 6-3/4 Inch, Black
    (Part #91015358)
    x
                

    Small block Chevy stock-type replacement 6-3/4" diameter harmonic balancer. For internal balance engines.

    • NOT recommended for RPM's in excess of 6500
    • NOT SFI certified
    • Internal balance
  • Professional Products 81006 S/B Ford Balancer Pulley Spacer, 3/8 Inch
    Professional Products 81006 S/B Ford Balancer Pulley Spacer, 3/8 Inch
    (Part #91015366)
    x
                

    This spacer must be used when replacing an original balancer that is 3-3/8" long which were typically found on '79 and earlier 351W engines.

    Harmonic Balancer Technical Notes (PDF)

  • Chevy 350 Harmonic Balancer, 8 Inch, Plain Steel
    Chevy 350 Harmonic Balancer, 8 Inch, Plain Steel
    (Part #91015357)
    x
                

    Small block Chevy 350 c.i. V-8 stock-type replacement 8" harmonic balancers. Internal balanced. Dampers are designed for press fit.

    • Ring and hub are bonded (vulcanized) to the elastomer
    • Surpasses the reliability and strength of OEM
    • NOT SFI-Approved
  • Speedway Chrome SB Chevy 400 Fluid Crank Damper, 7-1/4 Inch
    Speedway Chrome SB Chevy 400 Fluid Crank Damper, 7-1/4 Inch
    (Part #91015329)
    x
                

    Chrome plated steel balancer for S/B Chevy 383/400 c.i. V-8. Degreed from 10° ATDC to 50° BTDC. SFI serial number and timing marks are engraved on the outer ring.

    • Forged from 1025 low carbon steel  
    • Injected with high viscosity silicone fluid
    • External Balance 
    • Rated to 12,500 RPM
    • SFI 18.1 certified
    • 1.53" thickness excluding hub
  • Chevy 350 Harmonic Balancer, 8 Inch, Stainless Steel
    Chevy 350 Harmonic Balancer, 8 Inch, Stainless Steel
    (Part #91015348)
    x
                

    Small block Chevy 350 c.i. V-8 stock-type replacement 8" harmonic balancers. Internal balanced. Dampers are designed for press fit.

    • Ring and hub are bonded (vulcanized) to the elastomer
    • Surpasses the reliability and strength of OEM
    • Stainless steel version features a show quality polish
    • NOT SFI-Approved
  • Fluidampr Balancers 620101 Small Block Chevy Crank Damper, 6.25 Inch
    Fluidampr Balancers 620101 Small Block Chevy Crank Damper, 6.25 Inch
    (Part #755712615)
    x
                

    Eliminates crankshaft breaks, reduces wear on main bearings and increases horsepower. Fits 262-350 Small Block Chevy 1955-up (will not fit '92-up LT1). Internal balanced. 

    • 6-1/4" diameter
    • 7.9 lbs.
    • Steel housing
    • Black zinc chromate finsih
  • 1981-95 S/B Ford 302 4-Bolt Balancer, 50 Oz.
    1981-95 S/B Ford 302 4-Bolt Balancer, 50 Oz.
    (Part #91015334)
    x
                

    This Small Block Ford balancer features billet steel forgings, a durable elastomer bond. The 50 oz. balance factor is common to 1981-95 302.

    Has a 4-bolt pulley hub.  Has a anodized black finish.

  • Garage Sale - PowerForce Dodge 5.7L Harmonic Balancer
    Garage Sale
    Garage Sale - PowerForce Dodge 5.7L Harmonic Balancer
    (Part #91080014.GS)
    x
                

    This is garage sale priced because it has been discontinued. 

    NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS   

     

    Mopar Dodge 5.7L small block V8 balancer. 

  • Small Block Chevy 400 Harmonic Balancer, 8 Inch, Stainless Steel
    Small Block Chevy 400 Harmonic Balancer, 8 Inch, Stainless Steel
    (Part #91015415)
    x
                

    Small block Chevy 400 c.i. V-8 stock-type replacement 8" harmonic balancers. External Balanced. Dampers are designed for press fit.

    • Ring and hub are bonded (vulcanized) to the elastomer
    • Surpasses the reliability and strength of OEM 
    • Features a show quality polish and includes 60° of easy to read timing marks
    • NOT SFI-Approved
  • Professional Products 81007 S/B Ford Balancer Pulley Spacer, 1 Inch
    Professional Products 81007 S/B Ford Balancer Pulley Spacer, 1 Inch
    (Part #91015367)
    x
                

    This spacer must be used when replacing an original balancer that is 4" long which were typically found on '80 and later 351W, '80 and earlier 302, and late model 5.0L engines with some triming of spacer required on 5.0L engines.

    Harmonic Balancer Technical Notes (PDF)

  • Professional Products 81008 S/B Ford Balancer Pulley Spacer, 7/8 Inch
    Professional Products 81008 S/B Ford Balancer Pulley Spacer, 7/8 Inch
    (Part #91015368)
    x
                

    This spacer must be used when replacing an original balancer that is 3-7/8" long which were typically found on '80 and earlier 351W Ford racing HO engines or '80 and later 351W, 302, or 5.0L engines using the Ford Racing .917" crank sprocket.

    Harmonic Balancer Technical Notes (PDF)

  • EngineQuest BA289N Small Block Ford 3-Bolt Balancer, 28 oz.
    EngineQuest BA289N Small Block Ford 3-Bolt Balancer, 28 oz.
    (Part #91015359)
    x
                This all new "early" style 28 oz. balancer works with 3-bolt pulleys. The 28 oz. balance factor is common to 1965-69 289, 1970-80 302, and 1970-96 351W.
            
  • Speedway Chrome SB Chevy 350 Fluid Crank Damper, 6.25 Inch
    Speedway Chrome SB Chevy 350 Fluid Crank Damper, 6.25 Inch
    (Part #91015330)
    x
                

    Chrome plated steel balancer for S/B Chevy 350 c.i. V-8. Degreed from 10° ATDC to 50° BTDC. SFI serial number and timing marks are etched on the outer ring.

    • Forged from 1025 low carbon steel  
    • Injected with high viscosity silicone fluid
    • Rated to 12,500 RPM
    • SFI 18.1 certified