Product Summary

Buick, Chevy, GMC, Oldsmobile, Pontiac, Hobby Stock

  • These ball joints are designed with 2 ft. lbs. of resistance, which is the force required to move the stud of the ball joint
  • The low friction allow the suspension to give rather than allowing the tire to bounce over rough surfaces
  • Will fit several GM car and truck applications (see list)
  • Are precision machined to tight tolerances, providing consistent resistance throughout the travel of the ball joint to deliver consistent performance
  • Engineered to free the up suspension for more consistent, repeatable chassis tuning
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Key Specs

MFG. Part #20039LF
BrandAFCO
PositionLower
Ball Joint TypePress-in
Material TypeSteel
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Need To Know

Quick and Easy Returns

Return Policy

AFCO 20039LF Details

AFCO Low Friction Ball Joints are designed with 2 ft. lbs. of resistance, the force required to move the stud of the ball joint. Compare this with standard replacement joints, with as high as 50 ft. lbs. of resistance. A difference you can feel!

It is critical to handling that suspension components be as free as possible to move. Low friction ball joints allow the suspension to give rather than allowing the tire to bounce over rough surfaces. Low tire pressures magnify the need to minimize friction in the suspension.

See Application tab for corresponding vehicle models.

Item Details

Moog # K6145

Features:

  • Precision machined to tight tolerances, providing consistent resistance throughout the travel of the ball joint to deliver consistent performance
  • Improves weight transfer
  • Frees up suspension for more consistent, repeatable chassis tuning
  • Removes suspension rigidity and allows shock and spring to have more precise wheel control
  • Adjustments are controlled more effectively by the shock and spring instead of the tire which improves traction
  • Provides more accurate set-ups during vehicle scaling
  • Meets or exceeds standard ball joint strength
  • Stock appearing
  • Lower input steering efforts and faster steering wheel return

Features:

  • Precision machined to tight tolerances, providing consistent resistance throughout the travel of the ball joint to deliver consistent performance
  • Improves weight transfer
  • Frees up suspension for more consistent, repeatable chassis tuning
  • Removes suspension rigidity and allows shock and spring to have more precise wheel control
  • Adjustments are controlled more effectively by the shock and spring instead of the tire which improves traction
  • Provides more accurate set-ups during vehicle scaling
  • Meets or exceeds standard ball joint strength
  • Stock appearing
  • Lower input steering efforts and faster steering wheel return

Application

  • 1982-2002 Chevrolet S-10/Blazer (2WD)
  • 1982-2002 GMC Sonoma/Jimmy (2WD)
  • 1970-81 Chevrolet Camaro
  • 1970-81 Pontiac Firebird

1971-1976 GM B-Body

  • Chevrolet Impala
  • Chevrolet Caprice
  • Chevrolet Bel Air
  • Buick LeSabre
  • Buick Centurion
  • Oldsmobile Delta 88
  • Oldsmobile Delta 98
  • Oldsmobile Custom Cruiser
  • Pontiac Bonneville

1973-77 GM A-Body  

  • Buick (Century, Regal)
  • Chevy (Chevelle, Malibu, Monte Carlo, El Camino)
  • GMC (Sprint)
  • Oldsmobile (Cutlass, 442, Hurst Olds)
  • Pontiac (Grand Prix, LeMans)

1978-81 GM A-Body 

  • Buick (Century)
  • Chevy (Malibu)
  • Pontiac (LeMans thru '82)

1977-1996 GM B-Body

  • Chevrolet Impala (All, including SS)
  • Chevrolet Caprice (All)
  • Buick Electra ('85-'90)
  • Buick Estate Wagon ('85-'96)
  • Buick LeSabre ('87-'90)
  • Buick Roadmaster ('94-'96)
  • Oldsmobile Delta 88 ('77-'85)
  • Oldsmobile Delta 98 ('77-'84)
  • Oldsmobile Custom Cruiser ('77-'92)
  • Pontiac Bonneville/Catalina/Grandville ('77-'86)
  • Pontiac Safari ('87-'89)
  • Pontiac Parisienne ('83-'86)

1975-1979 GM X-Body

  • Chevrolet Nova
  • Buick Apollo (thru '75)
  • Oldsmobile Omega
  • Pontiac Ventura (thru '77)
  • Pontiac Phoenix 
1978-87 GM G-Body
  • Buick (Regal, Grand National, GNX)
  • GMC (Caballero)
  • Oldsmobile (Cutlass, Hurst Olds)
  • Pontiac (Grand Prix)
1978-88 GM G-Body
  • Chevy (Monte Carlo, El Camino)

Charts

Warranty Information

Click for details

Speedway Motors cannot facilitate the return of defective Afco products as they have requested to handle these directly with the consumer. For defective product support and Return Authorization, please contact Afco at +1 (800)-632-2320.

AFCO 20039LF Specifications

KEY SPECS
MFG. Part #20039LF
BrandAFCO
PositionLower
Ball Joint TypePress-in
Material TypeSteel
GENERAL
Degree of Taper10 degree
Hardware IncludedYes
Overall Diameter2.100"
Sold in QuantityEach

Ratings & Reviews

5

7 Reviews

Overall Assessment

Customers highly recommend our product, praising its high quality and practicality, specifically for circle track racing. It's noted for tightly pressed design that maintains the geometry of suspension systems, freeing up the front suspension smoothly. Users confirm our ball joints as "smooth as butter," highlighting their usability and excellent material quality. They're considered a staple in building new Pure Stock. The positive impact on racing vehicle performance sets our product distinctively apart from the competition.

5

7 reviews

5

7

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Yes I would buy again

5.0

2 months ago

B.Martin

North Carolina

Verified

Great ball joints

Would Recommend

Yes

5.0

2 years ago

Big T

Jacksonville Florida

Verified

Pressed in good and tight

Would Recommend

I would buy this product again and again

5.0

5 years ago

Dustin

Iowa

Verified

Between these and the PRP , Wow! What a difference in circle track racing, freed up the front suspension so smoothly and keeps the geometry of your suspension.

Would Recommend

Exactly what I needed.

5.0

7 years ago

Crystal

Cordele, GA

Verified

It was just what I needed and quality was excellent.

Would Recommend

i would buy this product again

5.0

7 years ago

Dragracer

North Carolina

Verified

These ball joints are smooth as butter

Would Recommend

Quality Product

5.0

7 years ago

Kade

Minnesota

Verified

We always use Speedway's lower ball joints when building a new Pure Stock.

Would Recommend

works great

5.0

8 years ago

hank

Medora il 62063

Verified

Dirt track car

Would Recommend

Showing 7 of 7 reviews

Questions & Answers

Fitment

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