Proform harmonic balancer (also called damper) covers come in 6-3/4” and 8” sizes as well as with and without a Chevy logo. They bolt to the inner hub, offer easy readability, eliminate flung off tape, and have looks like a $200.00 balancer.
Note: More parts will be added as time permits. If you don’t see the Proform part you are looking for, give us a call and if we don’t have it in stock, we will try to get it for you. We have much more Proform parts in stock then we have time to put on our web site.
Updated 04-11-2006.
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Proform Index Page
Air Cleaners
Air Cleaner Parts
Alternators
Alternator Brackets
Breather Caps, Oil Filler Tube
Carburetors
Carburetor Metering Blocks
Carburetor Main Bodies
Carb Throttle Base Plate
Dampers / Balancers
Damper / Balancer Covers
Differential Covers
Distributors
Distributor Parts
Dress-Up Kits
Engine & Trans Dipsticks
Fuel Pump Block Off Plates
Master Cylinder Covers
Oil Filler Caps
Rocker Arms
Starters
Tachometers
Timing Tabs
Timing Covers
Transmission Oil Pans
Valve Covers
Valve Cover Parts
Water Necks
Water Pumps (Electric)
Wire Looms & Dividers
Chevy Performance Proform Price Sheet (Excel File) Order Free Proform Catalog

Part Number Description Picture
66517BC
SBC Blue Anodized 6-3/4”
Harmonic balancer covers win runner-up award for Best New Street Performance Product. Slippage of the etched outer ring of a harmonic balancer, in relation to the inner-mounting hub, is a common occurrence. This cover fixes the problem because it bolts through the inner hub, offers easy readability, eliminates flung-off timing tape, and looks like a $200.00 balancer. Each cover is distinctively marked with Top Dead Center and the proper timing degrees. Note: For engines equipped with timing tab welded in the middle of timing chain cover, you must use a bolt-on aftermarket timing tab (Typically 1984 and later.).
SBC Harmonic Balancer Cover

66517BKC
SBC Black Anodized 6-3/4”
Harmonic balancer covers win runner-up award for Best New Street Performance Product. Slippage of the etched outer ring of a harmonic balancer, in relation to the inner-mounting hub, is a common occurrence. This cover fixes the problem because it bolts through the inner hub, offers easy readability, eliminates flung-off timing tape, and looks like a $200.00 balancer. Each cover is distinctively marked with Top Dead Center and the proper timing degrees. Note: For engines equipped with timing tab welded in the middle of timing chain cover, you must use a bolt-on aftermarket timing tab (Typically 1984 and later.).
SBC Harmonic Balancer Cover

66517BLTC
SBC Brushed Aluminum (Billet Look) 6-3/4”
Harmonic balancer covers win runner-up award for Best New Street Performance Product. Slippage of the etched outer ring of a harmonic balancer, in relation to the inner-mounting hub, is a common occurrence. This cover fixes the problem because it bolts through the inner hub, offers easy readability, eliminates flung-off timing tape, and looks like a $200.00 balancer. Each cover is distinctively marked with Top Dead Center and the proper timing degrees. Note: For engines equipped with timing tab welded in the middle of timing chain cover, you must use a bolt-on aftermarket timing tab (Typically 1984 and later.).
SBC Harmonic Balancer Cover

66517CC
SBC Chrome 6-3/4”
Harmonic balancer covers win runner-up award for Best New Street Performance Product. Slippage of the etched outer ring of a harmonic balancer, in relation to the inner-mounting hub, is a common occurrence. This cover fixes the problem because it bolts through the inner hub, offers easy readability, eliminates flung-off timing tape, and looks like a $200.00 balancer. Each cover is distinctively marked with Top Dead Center and the proper timing degrees. Note: For engines equipped with timing tab welded in the middle of timing chain cover, you must use a bolt-on aftermarket timing tab (Typically 1984 and later.).
SBC Harmonic Balancer Cover
     Note: Chevy Performance does not recommend that you get the chromed covers. We have determined that it is near impossible to time an engine with this version and a timing light. We do not stock these so they would have to be special ordered or you will have to wait until our next stock replacement order.

66517RC
SBC Red Anodized, 6-3/4”
Harmonic balancer covers win runner-up award for Best New Street Performance Product. Slippage of the etched outer ring of a harmonic balancer, in relation to the inner-mounting hub, is a common occurrence. This cover fixes the problem because it bolts through the inner hub, offers easy readability, eliminates flung-off timing tape, and looks like a $200.00 balancer. Each cover is distinctively marked with Top Dead Center and the proper timing degrees. Note: For engines equipped with timing tab welded in the middle of timing chain cover, you must use a bolt-on aftermarket timing tab (Typically 1984 and later.).
SBC Harmonic Balancer Cover

141-727
SBC Black Anodized 6-3/4” Chevy Logo
These patented harmonic balancer covers offer improved readability, more stable Top Dead Center indication and timing accuracy, enhanced appearance for a previously ignored under hood area, and the elimination of timing tapes. Distinctively marked with the famous Bow Tie logo, Top Dead Center and the proper timing degrees. Using this cover improves timing accuracy because over time the etched outer inertia ring of a typical harmonic balancer may slip in relation to the center hub of the balancer, causing the etched markings to provide an inaccurate indication of Top Dead Center for the #1 piston. Mounted directly through the center hub, this cover eliminates the affect of any outer inertia ring slippage. Aluminum. U.S. Patent 5,6785,078.
SBC Harmonic Balancer Cover

141-725
SBC Chrome 6-3/4” Chevy Logo
These patented harmonic balancer covers offer improved readability, more stable Top Dead Center indication and timing accuracy, enhanced appearance for a previously ignored under hood area, and the elimination of timing tapes. Distinctively marked with the famous Bow Tie logo, Top Dead Center and the proper timing degrees. Using this cover improves timing accuracy because over time the etched outer inertia ring of a typical harmonic balancer may slip in relation to the center hub of the balancer, causing the etched markings to provide an inaccurate indication of Top Dead Center for the #1 piston. Mounted directly through the center hub, this cover eliminates the affect of any outer inertia ring slippage. Aluminum. U.S. Patent 5,6785,078.
SBC Harmonic Balancer Cover
     Note: Chevy Performance does not recommend that you get the chromed covers. We have determined that it is near impossible to time an engine with this version and a timing light. We do not stock these so they would have to be special ordered or you will have to wait until our next stock replacement order.

Part Number Description Picture
66518BC
SBC Blue Anodized 8”
Harmonic balancer covers win runner-up award for Best New Street Performance Product. Slippage of the etched outer ring of a harmonic balancer, in relation to the inner-mounting hub, is a common occurrence. This cover fixes the problem because it bolts through the inner hub, offers easy readability, eliminates flung-off timing tape, and looks like a $200.00 balancer. Each cover is distinctively marked with Top Dead Center and the proper timing degrees. Note: For engines equipped with timing tab welded in the middle of timing chain cover, you must use a bolt-on aftermarket timing tab (Typically 1984 and later.).
SBC Harmonic Balancer Cover

66518BKC
SBC Black Anodized 8”
Harmonic balancer covers win runner-up award for Best New Street Performance Product. Slippage of the etched outer ring of a harmonic balancer, in relation to the inner-mounting hub, is a common occurrence. This cover fixes the problem because it bolts through the inner hub, offers easy readability, eliminates flung-off timing tape, and looks like a $200.00 balancer. Each cover is distinctively marked with Top Dead Center and the proper timing degrees. Note: For engines equipped with timing tab welded in the middle of timing chain cover, you must use a bolt-on aftermarket timing tab (Typically 1984 and later.).
SBC Harmonic Balancer Cover

66518BLTC
SBC Brushed Aluminum (Billet Look) 8”
Harmonic balancer covers win runner-up award for Best New Street Performance Product. Slippage of the etched outer ring of a harmonic balancer, in relation to the inner-mounting hub, is a common occurrence. This cover fixes the problem because it bolts through the inner hub, offers easy readability, eliminates flung-off timing tape, and looks like a $200.00 balancer. Each cover is distinctively marked with Top Dead Center and the proper timing degrees. Note: For engines equipped with timing tab welded in the middle of timing chain cover, you must use a bolt-on aftermarket timing tab (Typically 1984 and later.).
SBC Harmonic Balancer Cover

66518CC
SBC Chrome 8”
Harmonic balancer covers win runner-up award for Best New Street Performance Product. Slippage of the etched outer ring of a harmonic balancer, in relation to the inner-mounting hub, is a common occurrence. This cover fixes the problem because it bolts through the inner hub, offers easy readability, eliminates flung-off timing tape, and looks like a $200.00 balancer. Each cover is distinctively marked with Top Dead Center and the proper timing degrees. Note: For engines equipped with timing tab welded in the middle of timing chain cover, you must use a bolt-on aftermarket timing tab (Typically 1984 and later.).
SBC Harmonic Balancer Cover
     Note: Chevy Performance does not recommend that you get the chromed covers. We have determined that it is near impossible to time an engine with this version and a timing light. We do not stock these so they would have to be special ordered or you will have to wait until our next stock replacement order.

66518RC
SBC Red Anodized 8”
Harmonic balancer covers win runner-up award for Best New Street Performance Product. Slippage of the etched outer ring of a harmonic balancer, in relation to the inner-mounting hub, is a common occurrence. This cover fixes the problem because it bolts through the inner hub, offers easy readability, eliminates flung-off timing tape, and looks like a $200.00 balancer. Each cover is distinctively marked with Top Dead Center and the proper timing degrees. Note: For engines equipped with timing tab welded in the middle of timing chain cover, you must use a bolt-on aftermarket timing tab (Typically 1984 and later.).
SBC Harmonic Balancer Cover

141-728
SBC Black Anodized 8” Chevy Logo
These patented harmonic balancer covers offer improved readability, more stable Top Dead Center indication and timing accuracy, enhanced appearance for a previously ignored under hood area, and the elimination of timing tapes. Distinctively marked with the famous Bow Tie logo, Top Dead Center and the proper timing degrees. Using this cover improves timing accuracy because over time the etched outer inertia ring of a typical harmonic balancer may slip in relation to the center hub of the balancer, causing the etched markings to provide an inaccurate indication of Top Dead Center for the #1 piston. Mounted directly through the center hub, this cover eliminates the affect of any outer inertia ring slippage. Aluminum. U.S. Patent 5,6785,078.
SBC Harmonic Balancer Cover

141-726
SBC Chrome 8” Chevy Logo
These patented harmonic balancer covers offer improved readability, more stable Top Dead Center indication and timing accuracy, enhanced appearance for a previously ignored under hood area, and the elimination of timing tapes. Distinctively marked with the famous Bow Tie logo, Top Dead Center and the proper timing degrees. Using this cover improves timing accuracy because over time the etched outer inertia ring of a typical harmonic balancer may slip in relation to the center hub of the balancer, causing the etched markings to provide an inaccurate indication of Top Dead Center for the #1 piston. Mounted directly through the center hub, this cover eliminates the affect of any outer inertia ring slippage. Aluminum. U.S. Patent 5,6785,078.
SBC Harmonic Balancer Cover
     Note: Chevy Performance does not recommend that you get the chromed covers. We have determined that it is near impossible to time an engine with this version and a timing light. We do not stock these so they would have to be special ordered or you will have to wait until our next stock replacement order.

Part Number Description Picture
141-730
BBC Black Anodized 8” Chevy Logo
These patented harmonic balancer covers offer improved readability, more stable Top Dead Center indication and timing accuracy, enhanced appearance for a previously ignored under hood area, and the elimination of timing tapes. Distinctively marked with the famous Bow Tie logo, Top Dead Center and the proper timing degrees. Using this cover improves timing accuracy because over time the etched outer inertia ring of a typical harmonic balancer may slip in relation to the center hub of the balancer, causing the etched markings to provide an inaccurate indication of Top Dead Center for the #1 piston. Mounted directly through the center hub, this cover eliminates the affect of any outer inertia ring slippage. Aluminum. U.S. Patent 5,6785,078.
BBC Harmonic Balancer Cover

141-729
BBC Chrome 8” Chevy Logo
These patented harmonic balancer covers offer improved readability, more stable Top Dead Center indication and timing accuracy, enhanced appearance for a previously ignored under hood area, and the elimination of timing tapes. Distinctively marked with the famous Bow Tie logo, Top Dead Center and the proper timing degrees. Using this cover improves timing accuracy because over time the etched outer inertia ring of a typical harmonic balancer may slip in relation to the center hub of the balancer, causing the etched markings to provide an inaccurate indication of Top Dead Center for the #1 piston. Mounted directly through the center hub, this cover eliminates the affect of any outer inertia ring slippage. Aluminum. U.S. Patent 5,6785,078.
SBC Harmonic Balancer Cover
     Note: Chevy Performance does not recommend that you get the chromed covers. We have determined that it is near impossible to time an engine with this version and a timing light. We do not stock these so they would have to be special ordered or you will have to wait until our next stock replacement order.