Pontiac Firebird Engine Harmonic Balancer Replacement

Direct Replacement

Direct Replacement

Part Type: Solid Outer Diameter: 6.73 in ATP Number: 102075 ATP Availability: Available to Order Pioneer Number: DA-3071 Pioneer Availability: Available to Order Pioneer Supersession: Replaces DA-3071-HD

Part Type: Solid Outer Diameter: 6.73 in Supersession: Replaces DA-3071-HD

Hollow Back Part Type: Solid Outer Diameter: 6.74 in ATP Number: 102069 ATP Availability: Available to Order Pioneer Number: DA-3051 Pioneer Availability: Available to Order

Description: Hollow Back Part Type: Solid Outer Diameter: 6.74 in

Part Type: Solid Outer Diameter: 6.79 in ATP Number: 102037 ATP Availability: Available to Order Pioneer Number: DA-4551 Pioneer Availability: Available to Order

Part Type: Solid Outer Diameter: 6.50 in ATP Number: 102122 ATP Availability: Discontinued Pioneer Number: N/A Pioneer Availability: N/A ATP: Discontinuation / supersession date: 2020-11-24 ATP: Obsolete On: 2022-11-24 ATP: LifeCycle Change Log: Available to Order -> Discontinued ATP: LifeCycle Ticket Log: JNP-18368

V-Belt; Groove Qty. 2 Outer Diameter: 6.76 in ATP Number: 102040 ATP Availability: Available to Order Pioneer Number: DA-2501 Pioneer Availability: Available to Order w/o AC; w/o HDC

Direct Replacement

Direct Replacement wo/Air Conditioning wo/Heavy Duty Cooling

Diameter:6 3/4-in.; Finish:Natural; Material:Nodular Iron

Groove Qty. 4, 6 Part Type: Double Serpentine Outer Diameter: 7.52 in ATP Number: 102058 ATP Availability: Available to Order Pioneer Number: DA-3507 Pioneer Availability: Available to Order

Direct Replacement

Part Type: Solid Outer Diameter: 6.41 in ATP Number: 102063 ATP Availability: Available to Order Pioneer Number: DA-1890 Pioneer Availability: Available to Order

Description: Groove Qty. 4, 6 Part Type: Double Serpentine Outer Diameter: 7.52 in

Part Type: Solid Outer Diameter: 6.41 in

Groove Qty. 6 Part Type: Serpentine Outer Diameter: 7.07 in ATP Number: 102074 ATP Availability: Available to Order Pioneer Number: DA-2316 Pioneer Availability: Available to Order

Fits SB Chevy Engines;Internally Balanced; Diameter:6 3/4-in.; Finish:Natural; Material:Nodular Iron

Description: Groove Qty. 6 Part Type: Serpentine Outer Diameter: 7.07 in

Fits SB Chevy Engines;Internally Balanced; Diameter:8-in.; Finish:Natural; Material:Nodular Iron

Externally Balanced; Diameter:8-in.; Finish:Natural; Material:Nodular Iron

6.50 in. OD; External Balance; Black

7.50 in. OD; 0 Balance; Black

SFI Spec 18.1 Steel/Elastomer Neutral Balance 6.75 in. OD Black

SFI Spec 18.1; Steel/Elastomer; Internal Balance; 6.90 in. OD; Black

SFI Spec 18.1 Steel/Elastomer Internal Zero Balance 6.10 in. OD Specialty SBC Lightweight Black

SFI Spec 18.1; Steel/Elastomer; External Balance; 6.75 in. OD; Black

SFI Spec 18.1; Steel/Silicone Gel; Underdrive; Black

SFI Spec 18.1 Steel/Elastomer Internal Balance 8.0 in. OD Black

Supercharger Version

SFI Spec 18.1; Steel/Elastomer; External Balance; 8.0 in. OD; Removable C/Weight; Black

Bore Dia. Min/Max: 1.245 / 1.246 Degree Marking Range: 40 BTDC to 10 ATDC. Additional timing/degree amrks at 90, 180 and 270 Degree Markings: Yes Engine Balance: Internal Finish: No Finish Keyway: Single Length: 2.335 Material: Steel Mounting Hardware Incl.: No O.D.: 6-7/8" (6.875) Safety Rating: Not SFI Approved WT. in lbs.()=Rotating weight: 10.4 (6.9 Rwt) SMALL BLOCK GEN 1

SFI Spec 18.1 Steel/Silicone Gel Internal Balance 7.25 in. OD Removable Hub Grade 12.9 Fasteners Black [Except 5.7L]

SFI Spec 18.1; Steel/Silicone Gel [Running Design Change]; External Balance; 7.25 in. OD; Black

SFI Spec 18.1; Steel/Elastomer; Internal Zero Balance; 7.50 in. OD; Black

SFI Spec 18.1; Steel/Elastomer; Zero Internal Balance; 7.50 in. OD; Black

Bore Dia. Min/Max: 1.4818 / 1.4828 Degree Markings: No Engine Balance: Internal Finish: Black Zinc Keyway: None Length: 2.637 Material: Steel Mounting Hardware Incl.: No O.D.: 6-1/4" (6.25) Safety Rating: SFI 18.1 WT. in lbs.()=Rotating weight: 7.9 (5.3 Rwt) Incl. FIREHAWK

Bore Dia. Min/Max: 1.245 / 1.246 Degree Marking Range: 50 BTDC to 10 ATDC. Additional timing/degree marks at 90, 180 and 270 Degree Markings: Yes Engine Balance: Internal Finish: Black Zinc Keyway: Single Length: 2.335 Material: Steel Mounting Hardware Incl.: No O.D.: 6-1/4" (6.25) Safety Rating: SFI 18.1 WT. in lbs.()=Rotating weight: 7.9 (5.3 Rwt) GENERATION I LATE MODEL SMALL BLOCK, INT. BAL.

SFI Spec 18.1; Steel/Silicone Gel

Description: V-Belt; Groove Qty. 1 Outer Diameter: 6.685 in W/AC

; w/10% Underwire; Use w/crank flange hub 872015, 872016 or 872049 Race Balancer

Part Type: Solid Outer Diameter: 6.75 in

Description: 4 Bolt Hub; W/ 50 oz Weight Part Type: Solid Outer Diameter: 6.79 in

Bore Dia. Min/Max: 1.4818 / 1.4828 Degree Markings: No Engine Balance: Internal Finish: Black Zinc Keyway: None Length: 3.654 Material: Steel Mounting Hardware Incl.: No O.D.: 7-1/2" (7.500) Pulley Finish: Hard Coat Anodized Safety Rating: SFI 18.1 WT. in lbs.()=Rotating weight: 10.5 ( 7.7 Rwt)

Description: Groove Qty. 6, 4; 25% Underdrive Part Type: Double Serpentine Outer Diameter: 6.22 in

Part Type: Solid Outer Diameter: 6.75 in

7.52 in. Serpentine Groove Qty. 6 Street Performance

Bore Dia. Min/Max: 1.245 / 1.246 Degree Marking Range: 50 degree BTDC to 10 degree ATDC. Additional timing/degree marks at 90, 180 and Degree Markings: Yes Engine Balance: Internal Finish: Black Zinc Keyway: Single Length: 2.335 Material: Steel Mounting Hardware Incl.: No O.D.: 7-1/4" (7.250) Safety Rating: SFI 18.1 WT. in lbs.()=Rotating weight: 12.2 (8.1 Rwt) GENERATION I LATE MODEL SMALL BLOCK, INT. BAL.

Bore Dia. Min/Max: 1.245 / 1.246 Degree Marking Range: 40 degree BTDC to 10 degree ATDC. Degree Markings: Yes Engine Balance: Internal Finish: Black Zinc Keyway: Single Length: 3.9 Material: Steel Mounting Hardware Incl.: No O.D.: 7-1/2" (7.500) Safety Rating: SFI 18.1 WT. in lbs.()=Rotating weight: 13.1 (10.2 Rwt)

Description: Groove Qty. 6, 4; 10% Underdrive Part Type: Double Serpentine Outer Diameter: 6.62 in Large Pulley; 6.33 in Small Pulley

Bore Dia. Min/Max: 1.3722 / 1.3732 Degree Marking Range: 50 BTDC to 10 ATDC. Additional timing/degree marks at 90, 180 and 270 Degree Markings: Yes Engine Balance: Internal Finish: Black Zinc Keyway: Single Length: 2.837 Material: Steel Mounting Hardware Incl.: No O.D.: 6-5/8" (6.625) Safety Rating: SFI 18.1 WT. in lbs.()=Rotating weight: 10.4 (7.0 Rwt) 4 bolt pattern on 3.300 circle. Holes in pulley must be re-drilled. '69-later timing cover & pulleys may be required on Early Models.

Part Type: Solid Outer Diameter: 6.74 in

7.52 in. Serpentine Groove Qty. 6 SFI RACE

7.52 in. Double Serpentine Groove Qty. 4, 6 SFI RACE

Hub; Inner Shell; Damper Assembly; Outer Shell; Crank Pulley Bolts; Hardware

Hub; Inner Shell; Damper Assembly; Outer Shell; Crank Pulley Bolts; Hardware