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Sold Individually (317)

Sold as a Kit (128)

Sold as a Set of 100 (1)

Sold as a Set of 16 (26)

Sold as a Set of 500 (19)

+0.050 sportsman drag race/circle track (4)

+0.050 sportsman retainer for all 1.050 ID dual drag springs (2)

+0.050 sportsman triple spring drag race (4)

16 pieces (1)

2001-2016 GM Duramax family; retainer, OEM 12636393; OEM ref: 12636393; 97225507, 97366945; 97225508, 97366946 (1)

2006-2007 GM 8.1L Vortec; retainer for conical intake/exhaust springs (1)

2011-2020 Ford 6.8L Triton V10; conical spring; 91 415 C.I., (6.8L), SOHC, CNG, GAS, LPG, FI, 20 Valve, Vin S, ""Triton"" 1997-19 PART Valve Seat Insert FOT415-HD20V BORE - 90.2mm/3.55"" V1 (1)

5.0 Liter Coyote titanium retainer (2)

8 pieces (1)

Accessible exact result confirms part identity as Melling steel valve spring retainer, but usable dimensional specs were not exposed in accessible source text. (1)

Both-position lower spring rotator / retainer for stealth applications; use with lower rotator 161-1052; 13 728 C.I., (12.0L), E7-ETECH & ASET, Diesel, OHV, 24 Valve, ""TURBO"" L6; OEM ref: 12GC212A; 25502378; 575GC213 (1)

Fits PAC-1214 and 1214X; Gen 2 Mini Cooper (1)

Fits PAC-1217/1234/1281 (2)

Fits PAC-1225/1325/1243/1561 (2)

Fits PAC-1226 and 1326 (2)

Fits PAC-1240/1340/1540 (2)

Fits PAC-1243/1245/1343 (2)

Fits PAC-1244 and 1344 (2)

Fits PAC-1282 spring; Ford Godzilla 7.3L (4)

Fits PAC-1312 and 1312L; Ford Mod Motor A (2)

Fits PAC-1341 (2)

Fits PAC-1342/1386/1396 (2)

Fits PAC-1372 (2)

Fits PAC-1372 , Mini 8 Degree Locks (2)

Fits PAC-1373 (2)

Fits PAC-1392 (2)

Fits PAC-1900 (2)

Fits PAC-1901/1916/1918/1924/1940 (2)

Fits PAC-1902 (2)

Fits PAC-1903 (2)

Fits PAC-1906 (2)

Fits PAC-1908 (2)

Fits PAC-1914 (2)

Fits PAC-1933 (2)

For use in Top Fuel 7 Degree - dual spring (2)

For use in Top Fuel 7 Degree - triple spring (2)

Ford Mod Motor (6)

Ford Mod Motor; +0.060 install height retainer (2)

Ford tractor 2.0L 8N / similar; retainer; OEM ref: 1BA6505A2; 4Q6512; 8BA6507A (1)

Ford tractor 2.0L exhaust rotator / rototype; OEM ref: 4Q6512; 7HA6518A; 8BA6510B (1)

Heavy duty top for abusive Top Alcohol engines - dual (4)

JEGS exact part page lists ID 0.546 in, OD 1.152 in, material steel, and outside clip style. Quantity marked 1 from retail "each" listing. (1)

Light weight steel retainer for 1200-1201 spring (2)

Light weight steel version of R335 LS RPM dual spring (2)

Melling archive announcement confirms VSR-710 as a valve spring retainer for GM 4.3L, 5.0L and 5.7L engines, but accessible source did not expose detailed dimensional specs. (1)

Melling/OReilly exact result identifies VSR-717 as a steel valve spring retainer. Separate Melling archive search confirms this part was announced for GM 6.6L OHV applications. (1)

Mini 8 tool steel retainer for all 1.050 ID dual springs , Mini 8 Degree Locks (2)

OReilly exact part page lists OD 1.495 in and unit of measure each; Melling official spec chart states these retainers are manufactured for 7 degree valve locks. (1)

OReilly title says Melling steel valve spring retainer while the URL slug references stainless steel; material kept as steel from the displayed product title and conflict noted. (1)

Official Melling release for VSR-720 identifies Chrysler 2.0L and 2.4L SOHC applications and states quantity required 16; this appears to be application quantity, not pack quantity. (1)

Official Melling release for VSR-721 identifies GM 6.6L OHV diesel applications and states quantity required 32; this appears to be application quantity, not pack quantity. (1)

Official Melling release for VSR-722 identifies GM 1.2L, 1.3L, 1.4L and 1.5L DOHC applications and states quantity required 16. (1)

Official Melling release for VSR-723 identifies GM 2.0L, 2.5L, 2.7L, 3.2L, 3.6L and 4.2L DOHC applications and states quantity required 24. (1)

Official Melling release for VSR-724 identifies Ford/Lincoln/Mercury 3.3L, 3.5L and 3.7L DOHC applications and states quantity required 24. (1)

Official Melling release for VSR-726 identifies Lexus/Scion/Toyota DOHC applications and states quantity required 24; Intake and Exhaust. (1)

Official Melling release for VSR-728 identifies Lexus/Scion/Toyota 1.3L, 1.8L, 2.5L, 2.7L, 3.0L, 3.3L and 4.0L DOHC applications and states quantity required 24; Intake and Exhaust. (1)

Official Melling release for VSR-730 identifies Acura/Honda 3.0L and 3.5L SOHC applications and states quantity required 24. (1)

Official Melling release page confirms VSR-725 is a valve spring retainer for Ford 1.0L, 1.5L and 1.6L DOHC applications. Detailed PDF/spec values were not accessible from search results used here. (1)

Official Melling release page confirms VSR-727 is a valve spring retainer for Lexus/Toyota 2.5L, 3.5L, 4.0L, 4.6L, 5.0L and 5.7L DOHC applications. (1)

Official Melling release page confirms VSR-729 is a valve spring retainer for Acura/Honda 1.3L, 1.5L, 1.8L and 2.0L applications. (1)

Official Melling spec chart lists 475024 under 11/32 in valve stems with diameters 1.375/1.075/.785; only the first diameter was mapped to outer spring OD. (1)

RPM series dual springs (Mini 8 locks) (4)

Retainer (1)

Retainer for 1215, 1218, 1219, 1220 and other beehives (2)

Retainer for 1218, 1220 and others with standard 7 degree lock (2)

Retainer for 1218, 1220, and others with FMOD locks (2)

Retainer for 1255, 1295, 1595 (2)

Retainer; 110 360 C.I., (5.9L), OHV, GAS, CARB, 16 Valve, Vin 7, N, P, ""AMC"" 1970-91 V8; OEM ref: 5011790AA; 5086736AA (1)

Retainer; 2003-2010 Ford 6.0L/6.4L Power Stroke / MaxxForce 7; OEM/interchange refs: 3C3Z6514AA, Melling VSR707, PEP VSR328 (1)

Retainer; likely Cummins application (listed as new item for CUMMINS in SBI new/superseded feed) (1)

Retainer; likely Ford application (listed as new item for FORD in SBI new/superseded feed) (1)

Rotator / rotocap (2)

Rotator / rotocap; 100 318 C.I., (5.2L), OHV, GAS, CARB, 16 Valve, ""Motor Home"" 1969-75 V8 (1)

Rotator / rotocap; 107 2107 C.I., (34.5L), 3508B, Diesel, OHV, 32 Valve, ""Industrial/Marine TURBO"" 3508BIM V8; OEM ref: 121-2028, 210-2542, 468-8824, 20; 121-9835; 130-2607 (1)

Rotator / rotocap; 14 780 C.I., (12.8L), MP8, Diesel, SOHC, 24 Valve, ""TURBO"" L6; OEM ref: 12GC412, ASET; 20864662, 21990221; 20904074, 20905400; Spring style: Single or Dual (1)

Rotator / rotocap; 25 179 C.I., (2.9L), 3029D, Diesel, OHV, 6 Valve, ""PowerTech"" L3; OEM ref: R26125; R85687; R90692 (1)

Rotator / rotocap; 28 359 C.I., (5.9L), 6B5.9NA/6B5.9TA/6B5.9T, Diesel, OHV, 12 Valve, ""Cummins N/A & TURBO"" L6; OEM ref: 3802355; 3802356; 3900250 (1)

Rotator / rotocap; 43 361 C.I., (5.9L), D361, Diesel, OHV, 12 Valve L6; OEM ref: 1824680C1, NOTE; 1824683C1, NOTE; 671599C1 (1)

Rotator / rotocap; 49 436 C.I., (7.1L), D436/DT436, Diesel, OHV, 12 Valve, ""N/A & TURBO"" L6; OEM ref: 1811581; 675442C1 (1)

Rotator / rotocap; 51 855 C.I., (14.0L), N-14, Diesel, OHV, 24 Valve, ""TURBO"" L6; OEM ref: 138937; 3; 3054590 (1)

Rotator / rotocap; 52 530 C.I., (8.7L), 530E, Diesel, OHV, 12 Valve, ""HEUI Electrical Inj"" L6; OEM ref: 1820264-C1, C; 1820826-C91, W; 1821901-C1, U (1)

Rotator / rotocap; 58 1159 C.I., (19.0L), KTA19G/GC, Gas, OHV, 24 Valve, ""Natural Gas"" L6; OEM ref: 205091; 205208; 3018818 (1)

Rotator / rotocap; 60 629 C.I., (10.3L), 3176, Diesel, OHV, 24 Valve, ""TURBO"" L6; OEM ref: 1008150; 116-1102; 138-1999, 138-2006 (1)

Rotator / rotocap; 76 619 C.I., (10.1L), 6101A-T, Diesel, OHV, 12 Valve, ""500 Series TURBO"" L6; OEM ref: R102859; R102860; R40357, R53192 (1)

Rotator / rotocap; 78 893 C.I., (14.6L), 3406, Diesel, OHV, 24 Valve, ""TURBO"" L6; OEM ref: 1N4885, 1N4886; 2A4429; 2S4213 (1)

Rotator / rotocap; OEM ref: 102-6229, 163-2478; 166-2903; 166-2904; Spring style: Single or Dual (1)

Rotator / rotocap; OEM ref: 12GC212A; 25502378; 446GC296; Spring style: Dual (1)

Rotator / rotocap; OEM ref: 133-9306, W; 194-4902, I; 197-6995, W (4)

Rotator / rotocap; OEM ref: 148-7455; 1487425, 1487502, 1621589; 2A4429 (1)

Rotator / rotocap; OEM ref: 1833432C1; 1835655C1; 1835858C1, 1842146C1 (1)

Rotator / rotocap; OEM ref: 1W1816; 3N1414; 7N2051; Spring style: Dual (1)

Rotator / rotocap; OEM ref: 23515470; 23518571; 8929078, 23501580 (1)

Rotator / rotocap; OEM ref: 3904716, 3924583, 3929005; 3906412, 3991085, 5292625; 3908830, 3924582 (1)

Rotator / rotocap; OEM ref: 3925666, 3957914, N; 3925667, NOTE; 3926700 (1)

Rotator / rotocap; OEM ref: 4N5906; 4W2471; 4W2472; Spring style: Single or Dual (2)

Rotator / rotocap; OEM ref: R26125R; R41413; R41414 (1)

Rotator / rotocap; OEM ref: R48313; R504235; R520223 (1)

Rotator / rotocap; Spring style: Conical; Spring length used as height proxy: 2.050 in (1)

Steel LS retainer for 1221, 1521 (2)

Steel beehive LS retainer for 1218 and more (2)

Steel retainer for 1200-1201 (2)

Steel retainer for 1202, 1203 (2)

Steel retainer for 1222X LS spring (2)

Steel retainer for 1371 (2)

Steel retainer for 1371 spring , Mini 8 Degree Locks (2)

Steel retainer for LS RPM series duals (2)

Steel retainer for marine applications (2)

Summit describes 475044 as sold each; official Melling spec chart provides diameters and 7 degree lock note. (1)

Super Stock only (2)

Ti retainer for 1.175 series dual springs (2)

Ti retainer for 1225, 1325, 1243, 1561 dual springs (2)

Ti retainer for 1226, 1326 dual springs (2)

Ti retainer for 1227, 1239, 1254, 1297, 1509 dual springs (2)

Ti retainer for 1298, 1299 dual springs (2)

Ti retainer for 1371 dual spring (2)

Ti retainer for 1385, 1395 dual springs (2)

Ti retainer for LS dual springs, 1221, 1521 (2)

Ti retainer for all 1.050 ID dual springs (4)

Titanium Ford Mod Motor for 1512 spring (2)

Titanium LS retainer for 1221, 1521 (2)

Titanium LS retainer for 1530, 1335 , Mini 8 Degree Locks (2)

Titanium beehive LS retainer for 1218 and more (2)

Titanium retainer for 1222X spring (2)

Titanium retainer for LS RPM series duals (2)

Tool steel Pro Drag Race for 1376 spring (DLC option) , Mini 8 Degree Locks (2)

Tool steel Pro Series for 1326 spring (DLC option) , Mini 8 Degree Locks (2)

Tool steel Pro Series race for 1341 spring (DLC option) , Mini 8 Degree Locks (2)

Tool steel Pro Series race for 1373 spring (DLC option) , Mini 8 Degree Locks (2)

Tool steel retainer for 1222X spring (2)

Tool steel retainer for 1226, 1326 dual springs (4)

Tool steel retainer for 1227, 1239, 1254, 1297, 1509 duals (2)

Tool steel retainer for 1385, 1395 dual springs (4)

Tool steel retainer for 1530, 1335 dual springs , Mini 8 Degree Locks (2)

Tool steel retainer for LS dual springs, 1221, 1521 (2)

Tool steel retainer for all 1.050 ID dual springs (4)

Tool steel retainer for triple drag race springs (4)

Ultra lightweight steel for PAC-1295 / 1295X / 1595 spring , Mini 8 Degree Locks (2)

Ultra lightweight steel for Super Stock 1409 spring (2)

Ultra lightweight steel for Super Stock 1427 spring , Mini 8 Degree Locks (2)

V-Rod (4)

V-Rod Destroyer (2)

Valve spring retainer, valve stem diameter 0.234/0.235, outside/steps 0.982/0.590/0.484. (1)

Valve spring retainer, valve stem diameter 0.235, outside/steps 0.962/0.697/0.491. (1)

Valve spring retainer, valve stem diameter 0.272/0.273, outside/steps 0.897/0.594/0.544. (1)

Valve spring retainer, valve stem diameter 0.311/0.312, outside/steps 1.144/0.828/0.572. (1)

Valve spring retainer, valve stem diameter 0.311/0.312, outside/steps 1.144/0.830/0.562. (1)

Valve spring retainer, valve stem diameter 0.315, outside/steps 1.080/0.750/0.612. (1)

Valve spring retainer, valve stem diameter 0.315/0.316, outside/steps 1.275/0.958/0.570. (1)

Valve spring retainer, valve stem diameter 0.316, outside/steps 1.310/0.873/0.760. (1)

Valve spring retainer, valve stem diameter 0.341/0.342, outside/steps 1.236/0.862/0.675. (1)

Valve spring retainer, valve stem diameter 0.342, outside/steps 1.370/1.056/0.665. (1)

Valve spring retainer, valve stem diameter 0.370/0.373, outside/steps 1.330/1.000/0.600. (1)

Valve spring retainer, valve stem diameter 0.372, outside/steps 1.407/1.058/0.900. (1)

Valve spring retainer, valve stem diameter 0.430/0.431, outside/steps 1.570/1.207/0.840. (1)

PAC Racing Springs

Ferrea Racing Components

QualCast, LLC

Melling Engine Parts / Melling Tool Co.

Engine Pro

S. B. International, Inc.

Reliance Power Parts

Dart

Dura-Bond Bearing Company

Trend Performance Products

Silver Seal Products Company, Inc.

Manley

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PAC Racing Springs PAC-R566-16

RETAINER Ti-17 TITANIUM; Fits PAC-1244 and 1344 - 1.550 in. OD - 0.780 in. Second Step Diameter - 10 Degree Lock Angle - Titanium

Fitment for Part #: PAC-R566-16

Choose a vehicle or an engine to see if this part applies.

Year / Make / Model

Year

Make

Model

Engine

Manufacturer

Engine Family

Engine Size

Engine Pro 03-1013-500

Valve Spring Retainers - Steel BULK

Fitment for Part #: 03-1013-500

Model

Engine

Manufacturer

Manufacturer

Engine Family

Engine Size

22
23
24
25 (current)
26
27
28

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