Super Damper® Harmonic Dampers The patented ATI Super Damper is the only crankshaft damper designed exclusively for high performance Chrysler, Dodge and Mopar Engines - including the new HEMI! Whether you race or just drive on the street, ATI's harmonic balancers are the perfect choice. Eliminates torsional crankshaft vibrations Exceeds SFI 18.1 specs Black zinc chromate finished OEM equipment on 392 Mopar Crate Engines Tunable, rebuildable, and extremely efficient at ALL RPM Laser engraved 360° timing marks Inner and outer shells are available in aluminum or steel, and contain a steel inertia weight. This inertia weight has six (2-ring design) or eight (3-ring design) computer machined grooves to retain the proper durometer O-rings (dyno tested for each application). Damper Accessories How to read this chart

STEEL SHEELS

ALUMINUM SHELLS

CRANKSHAFT HUB PART NUMBERS

7.074" OD

6.325" OD

7.074" OD

6.780"

6.325" OD

5.5" OD

3 RING

2 RING

3 RING

3 RING

2 RING

3 RING

3 RING

2 RING

3 RING

STEEL

ALUM

TOTAL WEIGHT INERTIA WEIGHT

8.75 lbs 4.50 lbs

7.0 lbs 3.5 lbs

6.00 lbs 2.40 lbs

6.25 lbs 4.50 lbs

5.45 lbs 3.70 lbs

5.00 lbs 3.40 lbs

3.75 lbs 2.20 lbs

4.50 lbs 2.40 lbs

3.90 lbs 2.40 lbs

3.30 lbs 1.97 lbs

3.630 lbs 2.20 lbs

DAMPER ONLY LESS CRANKSHAFT HUB PART NUMBERS

CHEVROLET FRONT

917010

918940

917030

918850

917020

917000

917071

917070

917050

AVG WEIGHT 2.4 LBS

AVG WEIGHT .85 LBS

CHRYSLER OEM FRONT 5/16" BOLTS

918441E

918605S

918446E [7]

918440E

918455E

917040E

917041E

CHRYSLER OEM FRONT BLOWER DRIVE 3/8" PULLEY BOLTS

918442E

918440E

918445E

917042E

918443E

INTERNAL BALANCE DAMPER ASSEMBLY PART NUMBERS

V8 A 218-340-360 [2] [5]

CHEVROLET FRONT [1]

918280

918281

917390

917391

917580

916190

917370 [10]

917430 [10]

917550 [10]

916191

OEM FRONT

918282E

918283E

917392E

917393E

916253

918605 [16]

917400E

917401E

916254 [8]

VIPER V10 GEN I & II '92 - '02

OEM FRONT

917932E

916262

BLOWER DRIVES [3]

917931E

916260

VIPER V10 GEN III '03-'07 [9] [11]

OEM FRONT

917934E

916265

BLOWER DRIVES [3]

917933E

916264 [3]

HEMI PRO STOCK [1]

CHEVY FRONT

PASS SIDE TIMING

917981

916650L

DRV SIDE TIMING

917982

916651

V8 B 361 383 400 413 426 440

CHEVROLET FRONT [1]

917120

917121

918430

918431

917380

917440

917590

916200L

917980

917981

917970

917960

917540

916650L

OEM FRONT

OEM TIMING COVER

917470E

917477E

916661

917122E [12]

917467E [12,13]

917468E [12,13]

916661L

917471E

917472E

916421

917473E [12,13]

917474E [12,13]

916421L

DONAVAN & KB GEAR DRIVE OR INDY TIMING COVER

917478E

917479E

916661L

917127E [12]

917475E [12]

917476E [12]

916663

917930E

917937E

916421L

BLOWER DRIVES

A-FUEL 2.25" KEYWAYS 1@TDC

917123E [15]

916256 [4]

OEM BB 2.25" KEYWAY OEM TIMING TAB

917110E [14]

916258

EXTERNAL BALANCE DAMPER ASSEMBLY PART NUMBERS

V8 360 '71-'92 [2]

CHEVROLET FRONT

918600

916440

OEM FRONT

918603E

916442

918605E

916249

V8 360 MAGNUM '93-UP [2]

OEM FRONT

918604E

916442

V8 B 400-440 CAST CRANK

OEM FRONT OEM TIMING COVER ONLY

918601E [6]

916663

V8 B 440 HI-PERF 440 6-PACK

918602E [6]

[1] These assemblies fit Chrysler cranks and will accept pulleys, crank triggers, and oil pump drives designed for Chevrolet big block.
[2] Hubs are dimensioned to clear the stock cast-in timing tab. The damper face for pulley mounting will be forward of the OEM location by: .150” for 2-ring internal balance, .450” for 3-ring internal balance, .750” for 3-ring external balance. Hubs may be shortened by the listed amount for internal balance and .600” (.150” fwd of OEM) on external balance if the tab is cleared, or order ATI cover with adjustable tab (part #916259).
2-ring internal balance can be installed in the OEM location with minor clearancing of the timing tab and retain OE timing mark.
[3] Hub has 2 3/16 wide keys at 180O and requires a #916261 spacer which is supplied with the hub. ATI manufactures a one-piece billet hardcoated aluminum pulley (pt # 916263)with the OEM 7-groove serpentine for accessories & an outboard 10 groove serpentine for blower drive.
[4] Part # 916256 has a .600 counterbore, Part # 916257 has .830 counterbore.
[5] Aluminum hub OEM front (part #916255) is OK for 2 ring dampers.
[6] Cannot retain OE location. Must space out accessory pulleys .750”.
[7] For 2 ring shell assembly, use part #918447E.
[8] Part # 918605E is a 2-ring shell assembly.
[9] Supplied with new lightweight aluminum pulley to retain stock belt location.
[10] Specify shell assembly number and #916192 for aluminum hub.
[11] For Paxton Supercharger, add part #SK157C(OEM Paxton size) & SK157C2 (10% OD Paxton) for new aluminum pulley with 7 rib / 8 rib. Retains OEM belt location.
[12] Not an OEM replacement for stock pulley location.
[13] 3/8” pulley bolts in shell, Hub has 5/16”
[14] Passenger timing.
[15] Part #918442E-99 shell is used. 99 Duro rings are used with driver’s side timing.
[16] Customer must cut and reweld the stock timing tab. This damper is OEM location.
[17] 918432 - 5% OD, 918433- 5% UD, 918434 - 4% OD, 918435 - 2% UD, 918436 - 10% OD, 918437 - 17% OD
[18] 918438 - 13% UD use hub #916241, 918439 - 15% UD use hub #916242.
[19] Duralast belt #560K4
[20] Requires shorter belt: Goodyear #4070975

How to read this chart