ATI, LS1, LS6, LS2 7.480 Harmonic Damper - SFI

Engines and Components, Harmonic Balancers, Harmonic Balancers and Components
ATI: LS1, LS6, LS2 7.480 Harmonic Damper - SFI
ATI Performance, Manufacturer Part Number: 917303

Harmonic Balancer - Serpentine Super Damper - 7.480 in OD - SFI 18.1 - Aluminum / Steel - Black - Internal Balance - GM LS-Series - Each
Notes: GM Y-Body 6-Groove

Home > Products > Super Dampers > Chevrolet Super Dampers Super Damper® Harmonic Dampers The patented ATI Super Damper is the only crankshaft damper designed exclusively for high performance Chevy engines.   Eliminates torsional crankshaft vibrations Exceeds SFI 18.1 specs Black zinc chromate finished OEM equipment on ZZ572 GM Crate Engines Tunable, rebuildable, and extremely efficient at ALL RPM Laser engraved 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). If you need a Chevy damper for a serpentine belt set-up, see our Serpentine Damper Guide: Serpentine Dampers Damper Accessories LS1 Crank Pin Drill Fixture Kit Damper Installation Instructions How to read the Damper charts Chevy Super Dampers   CHEVROLET FRONT FOR HUB WITH INNER SHELL   LIGHT STEEL DAMPER: 3.5lbs INIERTIA WEIGHT   STEEL SHELLS ALUMINUM SHELLS CRANKSHAFT HUB PART NUMBERS 8.074" OD 7.074" OD 6.325" OD 8.17" OD 7.074" OD 6.325" OD 3 RING 3 RING 2 RING 3 RING 2 RING STEEL ALUM STEEL WITH INNER SHELL TOTAL WEIGHT INERTIA WEIGHT 15.4 lbs 7.6 lbs 11.5 lbs 4.5 lbs 8.3 lbs 2.4 lbs 13.6 lbs 7.6 lbs 6.25 lbs 4.5 lbs 5.45 lbs 3.70 lbs 5.0 lbs 3.4 lbs 3.9 lbs 2.4 lbs 2.2 lbs 1.97 lbs DAMPER ONLY LESS CRANKSHAFT HUB PART NUMBERS CHEVROLET FRONT [1] 917007 917010 918940   917030 918850 917020 917070 917050 AVG. WEIGHT 2.4 lbs AVG. WEIGHT .85 lbs — CHEVROLET FRONT FOR HUB WITH INNER SHELL [2]     917009                 917011               INTERNAL BALANCE DAMPER ASSEMBLY PART NUMBERS SB V6 & V8 1.246" CRANK STANDARD FRONT NO COUNTER BORE   917785 917782   917220 917221 917200 917410 917260 916040                 917210 917480 917320   916090       917781                 916951   917780                   916951 STANDARD FRONT NO COUNTERBORE 2ND 3/16" KEYWAY AT 180° FROM STANDARD   917780K                   916951K STANDARD FRONT NO COUNTER BORE UNDERSIZED HUB 1.24" BORE     917781U                 916951U USE WITH DRY SUMP COUNTER BORE ACCEPTS DRIVE MANDREL [4]           917204 917206 917412   916044       917788                   916952     917789                 916952 USE WITH JESEL BELT DRIVE [5]         917232   917234 917236     916092   409 [8]     917781                 916951 LS1 SB V8 1.483" CRANK COUNTERBORED TO ACCEPT DRIVE MANDREL [4]   917777 [16] 917776   917211 [16, 17]   917213 [16, 17] 917215 [17]   916045 [13]     SB V8 1.600" CRANK STD FRONT - USE W/ DRY SUMP COUNTER BORE TO ACCEPT DRIVE MANDREL [4]   917783 917784   917222 917223   917411 917261 916043                     917229   916093   STD FRONT - USE WITH DRY SUMP COUNTER BORE TO ACCEPT DRIVE MANDREL - 2ND 1/4" KEYWAY AT 180° FROM STANDARD [4]   917783K               916043K     V8 BIG BLOCK   STANDARD OEM FRONT 917062                     916890   917065 917061   917300 917301       916010             917310 917311   918720     916080   917060                   916890 2ND 1/4" KEYWAY 180° FROM STANDARD 917062K 917060K                   916890K STD OEM FRONT UNDERSIZED HUB 1.594" BORE   917060U               916890U EXTERNAL BALANCE DAMPER ASSEMBLY PART NUMBERS HUB HUB, SHELL & WGHT HUB & SHELL V8 SB 400 917080   916071-2 916070-2 V8 BB 454-502 MARK IV & GEN 5 STD OEM FRONT   917740                 916122-2 916120-2 [1] These are damper shell assemblies only - without a hub [2] These dampers are outer shell, inertia weight and o-rings only. The inner shell is integral with the crank hub. [3] Hub is 1” longer than standard. [4] Hubs for these assemblies have a 2.280 counterbore. A standard length crank bolt is used and the mandrel bolts to the 3 pulley mounting holes. This eliminates the 4” - 6” long bolt that is ineffective in retaining torque. Adapter part # 916321 is available for existing mandrels with 1.245” pilot. [5] Aluminum hubs for these assemblies have a 2.250 seal diameter with a .500 wall thickness and fits inside the Jessel lower pulley. This eliminates hub failure at the keyway on engines driving dry sump pumps and pulleys. For Comp Cams style belt drive, use a 7", 2 ring Damper due to fitment issues with the cam timing adjustment. Hub must be machined to fit inside lower cam gear. [7] Use hub part # 916172 for 1.245” crankshaft with BB seal and Chevy bolting. [8] Timing pointer must be corrected. Original pointer shows approximately 10° @ TDC (advanced) when the piston is at TDC. [13] Use part #916088 for Jesel Belt Drive and steel hub [15] Non-stock damper - 8 week lead time required. [16] 7" Dampers will not fit front distributor drive timing covers [17] Aluminum Hub (part #916099) available. Add $25 at time of order.   For boat applications, ATI offers Hub Part #916098 to allow the damper to be mounted to the back of the crankshaft.   GM Supercharged Dampers   CHRYSLER OEM FRONT BLOWER DRIVE 3/8-24 PULLEY BOLTS   CHEVROLET FRONT - 6 BOLT ENGINE DAMPER PART # OUTER DIAMETER WEIGHT (LESS HUB) INERTIA WEIGHT SHELL MATERIAL HUB # (AVG WEIGHT 2.4 LBS) SB BLOWER - 1.246" CRANKSHAFT - 2 X 3/16 KEYWAYS, RACE USE: 8 LBS MAX BOOST, STREET USE: 12 LBS MAX BOOST 918872E 7.074" 8.75 LBS 4.5 LBS STEEL 916133 [1] SB BLOWER W/BBC 1.600" CRANKSHAFT, 3/16" & 1/4" KEYWAYS 180° APART 918873E 7.425" 8.75 LBS 4.5 LBS STEEL 916134 [3,4] SB 6-BOLT 3/18-16 CHEVY FRONT DUAL 3/16" KEYWAYS - BB CHEVY SEAL DIAMETER - USE #925500 COVER 918869 7.074 8.75 LBS 4.5 LBS STEEL 916172 1997 - 2013 LS1, 2, 3, 6 Y BODY, G8, SS & 2004 - 2007 CTS-V 8 & 4 GROOVE 917345 7.425" - - STEEL 916032-M3 10 & 4 GROOVE 917347X 7.530" - - ALUM 916032-M3 10 GROOVE - NO A/C 917349X 7.530" - - ALUM 916032-M3 LS1 F BODY (8 & 4 GROOVE) 917345A 7.425" - - STEEL 916031 LS1 / LS2 F BODY CAMARO / FIREBIRD / V BODY GTO 6 BOLT PATTERN FOR BOLT ON BLOWER PULLEY, SINGLE 3/16” KEYWAY 918853 7.425" - - STEEL 916031S [5] LS3 Z-BODY 2010 - 2015 CAMARO & GEN 3 VORTEC TRUCK 6 BOLT PATTERN FOR BOLT-ON BLOWER PULLEY, SINGLE 3/16” KEYWAY 918635 7.480" 14.00 LBS 4.0 LBS ALUM 916430M LS3 2010-2015 CAMARO & GEN 3 VORTEC TRUCK - 4% OD (10 & 4 GRV) 918632 7.950"   - ALUM 916430M LS3 2010-2015 CAMARO & GEN 3 VORTEC TRUCK - 4% OD (8 & 4 GRV) 917285 7.425"   - STEEL 916430M LS3 Z BODY CAMARO 2010 - 2015 LS1/LS2 C & K BODY TRUCK SSR, AND TRAILBLAZER - SINGLE 3/16" KEYWAY 10 GROOVE, 8” 6% OD WITH AC 918625 8.190" - - ALUM 916430M 10 GROOVE, OEM WITH AC 918627 7.530" - - ALUM 916430M LS7 Y BODY, 10 GROOVE - 8” 10% OD - OEM AC PULLEY, SINGLE 3/16” KEYWAY 918622 8.250" - - ALUM 916058 LS9 Y BODY, 11 & 6 GROOVE, 14% OD 918624 8.530" - - ALUM 916107 LS9 Y BODY, 11 & 6 GROOVE 918634 7.530" - - ALUM 916107 BB BLOWER 3/16” & 1/4” KEYWAYS, 180° APART 918871E 7.074" 8.75 LBS 4.50 LBS STEEL 916145 918870E 7.074" 6.25 LBS 4.50 LBS ALUM 916145 BB BLOWER 38-24 CHEVY FRONT 3/16” & 1/4” KEYWAYS, 180° APART 917064 7.074" 6.25 LBS 4.50 LBS STEEL 916891 [2] BB BLOWER DRIVE WITH JESEL BELT DRIVE, 3/16” & 1/4” KEYWAYS, 180° APART HUB HAS 24 TOOTH 8MM HTD ACCESS. DRIVE 918874E 7.425" 8.75 LBS 4.50 LBS STEEL 916144 BB BLOWER, 3/16” & 1/4” KEYWAYS 180° APART - EXTERNAL BALANCE 917741E 7.425" 8.75 LBS 4.50 LBS STEEL 916143 Use hub part #916136 for 1.246“ SB crankshaft with BB seal and Chrysler bolting. One-piece hub and inner shell. For equally spaced OEM holes & ignition trigger, use #916134A. The BB Chevy & SB Chevy with BB 1.600” nose both use a unique 2-piece hub that allows the stock length bolt to hold the damper to the crank & a separate extension to locate the blower pulley and crank trigger. Use hub part #916031A for larger seal diameter and dual 3/16” keyways. Recommended when exceeding 10 lbs of boost or using a 12 rib or cog drive. Includes proper seal (required).   LS Shell Assemblies for Supercharged Applications Aluminum shell assemblies for LS1, LS2, LS3, LS6, Gen 3 & 4 Truck Diameter Ribs Part #   8.27" 8.19" 7.96" 7.95" 7.53" 7.53" 7.48" 8 10 8 10 10 10 8 917108 [1] 917094 917107 [1] 917091 917034X [2] 917034 [3] 917139 Must be counter sunk drilled for Y Body apps. 5/16 countersunk pulley bolt holes 3/8 countersunk pulley bolt holes GM Corvette Y-Body Serpentine Dampers INCLUDES LS1, LS2, LS3, LS6, LS7, LS9, LT1, LT4, LT5 AND V6 ENGINES ENGINE DAMPER PART # OUTER DIAMETER WEIGHT (LBS) SHELL MATERIAL SHELL ASSEMBLY # RIBS 4 RIB REAR PULLEY # HUB # [2] HUB MATERIAL LS1 '97-'04 C5 LS2 '05-'07 C6 LS3 [13] '08-'13 C6 LS6 '01-'04 C5 Z06 G8/L76 ‘08-'09 NEW “SS” 917246 [6] 7.53" (OEM) 9.75 LBS STEEL 917016CSX 6 916734 916032-M3 STEEL 917266 [6] 7.48" (OEM) 7.34 LBS ALUM 917074CS 6 916734 916032-M3 STEEL 917303 7.48" (OEM) 7.34 LBS ALUM 917073CS 6 — 916032-M3 STEEL 917278 [1,5,6] 6.78" (10% UD) 4.5 LBS ALUM 917071CS-44X 6 4 RIB AC - 916732 916032-M3 STEEL 917279 [1,5,6] 6.78" (10% UD) 4.5 LBS ALUM 917071CS-44 6 — 916032-M3 STEEL 917247 [1,5,6] 6.78" (10% UD) 4.5 LBS ALUM 917071CS-44 6 — 916036 ALUM 917304 7.48" (OEM) 7.34 LBS ALUM 917073CS 6 HTD 8MM x 28T 916033A STEEL 917289 6.78" (10% UD) 4.5 LBS ALUM 917071CS 6 HTD 8MM x 28T 916033A STEEL 918848 [3, 14] 5.67" (25% UD)   ALUM   6 4 RIB - 916179 916349 STEEL 918847 [14] 5.67" (25% UD)   ALUM   6 — 916349 STEEL LS7 LS3 W/DRY SUMP [13, 16] 918620 7.43" 9.0 LBS ALUM 917049 [15] 8 4 RIB [11] 916058 STEEL 918620N 7.48" 9.0 LBS ALUM 917049N [15] 8 — 916058 STEEL 918620U 6.73" (10% UD) 4.5 LBS ALUM 917049U 8 4 RIB [11] 916058U STEEL 918620UN 6.78" (10% UD) 4.5 LBS ALUM 917049UN 8 — 916058U STEEL 918622 8.25" 11.75 LBS ALUM 917089 10 — 916058 STEEL LS9 ZR1 918634 7.53" 6.7 LBS ALUM 917097 11 6 RIB [11] 916107 STEEL 918624 [12] 8.53" (14% OD) 11.5 LBS ALUM 917093 11 6 RIB [11] 916107 STEEL LT1 LT4 [7] [10] 917274 7.53" 9.75 LBS STEEL 917015 6   916096A [9] STEEL 917275 6.78" 4.5 LBS ALUM 91707144 6   916096A [9] STEEL [1] Requires shorter serpentine belt. Goodyear pt #4060785 for accessories & 4040405 for AC. [2] All hubs have 3/16 key @ std SB 10° location. Please note: 8 groove & 10 groove shell assemblies are available for supercharger applications. Consult your ATI salesman. #917017 (7 1/2” diameter, 8 groove, steel) #917075 (6 3/4” diameter, 8 groove, aluminum) [3] Requires shorter belts: Gates #K060775 - 6 rib, Goodyear #K040405 - 4 rib [4] Use hub part # 916033A for integral 8mm 28 tooth HTD pulley. [5] Contains 40 durometer rubber. Not for full race engines. Specify 66 rubber or call. [6] Damper assemblies have all countersunk bolts so nothing protrudes past front of damper. If you have an older damper and are ordering a new shell assembly only, you must cut a .090” x 45° chamfer on the front of your hub. ATI can also perform this operation for $40. [7] Dampers furnished with #916320 hub spacer. For ‘97 & up Camaro/Firebird or ‘96 & up Corvette engine with a reluctor wheel; discard spacer provided.   [9] Hubs are made of heat-treated alloy steel. [10] Washer #953070 is required with LT1 hubs and is shipped with dampers. [11] Non-removable A/C pulley - OEM diameter. [12] Contact Lingenfelter for proper belt set-up. [13] 2010 LS3 Corvette Grand Sport coupes w/Manual Transmissions come equipped with a Dry Sump system, so an LS7 style damper is required. [14] For no A/C - Order Hub #916349D with pulley delete ring. [15] Contains 60 durometer elastomers [16] Non-removable AC-pulley - OEM Diameter

Located just outside of Baltimore, MD, ATI Performance Products specializes in automatic transmissions and their components for the Racing markets. ATI's product line includes a full line of automatic transmissions and related components, including harmonic balancers, crankshaft hubs, dipsticks, timing pointers, hasteners, fluids, tailhousings, as well as other drivetrain parts..

Note: Some item may only be shipped by Ground Shipping due to Hazmat Restrictions.
Air Restricted: NO
State Restrictions:
Requires shipment by Truck Freight: NO