Serpentine Series Super Damper Applications The ATI Serpentine Super Damper contains grooves for serpentine belts machined into the outer damper shell. The dampers come standard with 6 outer grooves for standard OEM drive systems. 8 & 10 grooves are available for supercharger or turbo applications. We currently have dampers for the Ecotec, LS1, LS7, LT1 and LT4 GM engines, Ford modular 4.6 engine, and the Toyota JZ80 and 4YE engines. Double serpentine pulleys dampers are also available for 1998 and later F or Y body, LS-1 equipped vehicles with A/C The dampers are available in OEM 7.5" diameter, 6.75" diameter for 10% under-drive on accessories, and 5.5" outer shell diameters. Crank hubs may be fitted with a 6 groove serpentine pulley to drive external oil pumps or vehicle accessories at 60% crank speed. The Serpentine Series dampers fit all ATI GM-front crank hubs and can be adapted to many engine combinations providing maximum flexibility. The dampers are available in steel or lightweight hard-coated aluminum and come with laser engraved 360° timing marks. Exceeds SFI 18.1 specs. LS1 Crank Pin Drill Fixture Kit Custom Ford Water Pump Damper Accessories How to read the Damper charts

		DAMPER ASSEMBLY WITH HUB			SHELL ASSEMBLY LESS HUB	HUBS [4]
		STEEL SHELL	ALUMINUM SHELL			STEEL	ALUM [5]
		7.5" OD	7.5" OD	6.78" OD	6 RIBS	AVG WEIGHT 2.9 lbs	AVG WEIGHT 1.4 lbs
TOTAL WEIGHT		9.75 lbs	6.75 lbs	4.5 lbs
B BODY IMPALA & CAPRICE	LT1 [2] [7]			917327	91707144	916049A [3] [5]
F BODY CAMARO & FIREBIRD	LT1 LT4 [2] [7]	917270			917015	916047A [3] [5] [10]
			917268		917073
				917271	91707144
				917272	917071		916095
Y BODY CORVETTE	LT1 LT4 [2] [7]	917274			917015	916096A [3] [5]
			917269		917073
				917275	91707144
				917273	91707144		916094

		DAMPER ASSEMBLY WITH HUB				SHELL ASSEMBLY LESS HUB	REAR A/C PULLEY 4 GROOVE SERPENTINE		HUBS [4]
		STEEL SHELL	ALUMINUM SHELL						STEEL	ALUM [5]	STEEL W/ INNER SHELL
		7.5" OD	7.5" OD	6.8" OD	5.5" OD	6 RIBS	OEM DIA.	10% UD [1]	AVG WEIGHT 2.9 lbs	AVG WEIGHT 1.4 lbs	AVG WEIGHT 2.9 lbs
TOTAL WEIGHT		9.75 lbs	6.75 lbs	4.5 lbs
F BODY CAMARO FIREBIRD LS1 [5]	OEM DIA. A/C PULLEY	917242				917016	916734		916031
			917264			917074
	10% UD A/C PULLEY			917276 [9]		91707144		916732
	10% UD NO A/C PULLEY			917277 [9]
				917243 [9]						916035
	DRY SUMP 60% UD [6]	917259				917075			916037
			917238			917073
			917265							916034
				917239		91707144			916037
				917245						916034
	HTD 8MM 25T PULLEY		918852			917073			916037 [6]
Y BODY CORVETTE LS1 [5]	OEM DIAMETERS WITH A/C	917246 [11]				917016 CSX	916734		916032
			917266 [11]			917074 CS
	10% UD WITH A/C			917278 [1] [9] [11]		917071 CS44X		916732
	10% UD NO A/C PULLEY			917279 [1] [9] [11]		917072 CS44
				917247 [1] [9] [11]						916036
	DRY SUMP 60% UD	917248 [11]				917015 CS			919033 [8]
			917267 [11]			917073 CS44
			917218 [11]							916038
				917249 [1] [11]		917071 CS			919033 [8]
				917219 [1] [11]						916038
	8-RIB 10% UD WITH A/C				918661						916954
PONTIAC GTO - LS1	10% UD A/C PULLEY			917276		91707144		916732	916031
K BODY	LS1 TAHOE	917286				917015	916734		916430 [5]

[1] Requires shorter serpentine belt. Goodyear pt #4060755 or NAPA pt #NBH25060755.
[2] Dampers furnished w/ #916320 hub spacer. For ‘97 & up Camaro/Firebird or ‘96 & up Corvette eng. with a reluctor wheel; discard spacer provided.
[3] For hubs with a 6 hole bolt pattern and 2.25 seal, use hub #916049B for B body, 916048B for F body and 916096B for Y body.
[4] All hubs have 3/16 key @ std SB 10° location. Please note: 8 groove & 10 groove shell assemblies available for supercharger applications. Consult your ATI salesman. #917017 (7 1/2” diameter, 8 groove, steel) #917018 (7 1/2” dia, 10 groove, steel) #917075 (6 3/4” dia, 8 groove, alum.)
[5] Hubs are made of heat-treated alloy steel.
[6] Alum. hub #916037A has 8mm, 25 tooth HTD belt drive instead of serpentine
[7] Washer #953070 is required with LT1 hubs & is shipped with dampers.
[8] Use hub part # 916033A for integral 8mm 28 tooth HTD pulley.
[9] Contains 40 durometer rubber. Not for full race engines. Ask for technical help or specify 66 rubber.
[10] This hub has a 3-bolt pattern. For a 6-bolt pattern, use hub # 916048A.
[11] Damper assemblies have all countersunk bolts so nothing protrudes past front of damper. If you have an older damper & are ordering a new shell assemblies only, you must cut a .090” x 45° chamfer on the front of your hub. ATI can also perform this operation for $40 if you send your hub in.
[12] Damper is 12% UD from stock; not for over 600HP on the street
[13] Non-removable A/C pulley - OEM diameter
[14] Belt part numbers: A/C 4040390, and Accessories 4060775.

How to read this chart

Choose the specific engine application listed down the left side of the chart Determine if the damper needs to be internally or externally balanced ( external balance dampers are constructed of steel only). Black bars that extend horizontally across the entire chart designate these sections Determine if you need steel or aluminum shells. Labels for this information are listed across the top of the chart in columns 2 and 3. Once you have determined the shell material, you need to find the outside diameter (OD) of the desired steel or aluminum shell. Then choose between 2 or 3 rings and the desired weight of the damper. From the far right section of the chart, select either a steel or aluminum hub for your desired engine application. To determine the correct damper assembly part number that intersects is the correct damper assembly.