Parts - Engine - Top-end - Valves - Collars

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T-6 lightweight aluminum, blue anodized. Used in high lift, up to .600" valve lift, applications. Allows cam grinds C, D, M, 9, 10, Z, 3 to be installed without machine work.

Note: See 503550 for required matching Andrews .600" high lift valve springs.

Andrews, top collar set. Aluminum. .600" lift

#503535

Stock:Yes

Andrews, lower spring collar set. Steel. +.060" lift

#503545

Stock:Yes

Compatible with 1.437" - 1.500" spring diameter. 10° angled for OEM H-D fitment. Fits double springs with damper. Fits all valve stem sizes. Titanium is as strong as steel and still offers a 50% weight reduction.

JIMS, upper valve spring collars. Titanium

#978090

Stock:Yes

Compatible with 1.500" - 1.550" spring diameter. 10° angled for OEM H-D fitment. Fits double springs with damper. Fits all valve stem sizes.

JIMS, upper valve spring collar set. Chromoly

#978094

Stock:Yes

Compatible with 1.185" - 1.589" spring diameter. 10° OEM angled. Fits .310" (7.87mm) valve stems and one-piece 'Beehive' style springs. Titanium is as strong as steel and still offers a 50% weight reduction.

JIMS, upper valve spring collars. Titanium

#978586

Stock:Yes

Compatible with 1.095" - 1.445" spring diameter. 10° angled for OEM H-D fitment with stock 7mm valve stems and single Beehive style springs.

JIMS, upper valve spring collar set. Chromoly

#978587

Stock:No

Compatible with 1.095" - 1.445" spring diameter. 10° angled for OEM H-D fitment with stock 7mm valve stems and single Beehive style springs. Titanium is as strong as steel and still offers a 50% weight reduction.

JIMS, upper valve spring collars. Titanium

#978585

Stock:Yes

OEM style replacement steel lower collars for use in OEM applications. USA made. Repl. 18220-83.

Lower valve spring collar set. steel. std

#910808

Stock:Yes

OEM style replacement precision machined titanium valve spring top collars. Manley suggests the use of titanium top collars on high lift applications to provide increased strength and reduced inertia mass which allows running higher R.P.M.'s without valve float.

Manley, valve spring top collar set. Titanium

#513884

Stock:Yes

OEM style replacement precision machined steel valve spring top collars.

Manley, valve spring top collar set. Steel

#513881

Stock:Yes

OEM style replacement precision machined titanium valve spring top collars. Manley suggests the use of titanium top collars on high lift applications to provide increased strength and reduced inertia mass which allows running higher R.P.M.'s without valve float.

Manley, valve spring top collar set. Titanium

#513888

Stock:Yes

OEM style replacement steel top collars for use in OEM applications. USA made. Repl. 18219-83A.

Upper valve spring collar set. steel. std

#509698

Stock:Yes

Andrews, lower spring collar set. +.060"

#503546

Stock:Yes

Compatible with 1.437" - 1.500" spring diameter. 10° angled for OEM H-D fitment. Fits double springs with damper. Fits all valve stem sizes.

JIMS, upper valve spring collar set. Chromoly

#978093

Stock:Yes

Black steel flanged screw only. HHC, grade 8. 5/16-18 x 3/4". Installs the small cam drive (pinion) gear that is connected with the cam drive driven sprocket. This is the smaller, and shorter, bolt only from 25566-06 OEM kit (2-bolt + 2-washer kit). It is not separately available from OEM.

S&S, flanged screw. cam drive gear sprocket retention

#924946

Stock:Yes

Chromoly. Dimensions: .060" thick, .570" I.D. and 1.590" O.D. Jims chromoly steel lower collars are custom machined to prevent harmonic vibrations in the springs caused by the lower collar moving in the head. Compatible with OEM parts

Jims, lower valve spring collar set. Chromoly

#978584

Stock:Yes

Heat treated steel. For use in up to .560" medium lift applications, no machining required. Can be used with 906855 high performance springs but are compatible with OEM springs. For high RPM the 906855 spring set for higher spring pressure is recommended.

Andrews, top collar set. Steel. .560" lift

#503723

Stock:Yes

Chromoly. Dimensions: .080" thick, .585" I.D. and 1.500" O.D. Jims chromoly lower collars are custom machined to prevent harmonic vibrations in the springs caused by the lower collar moving in the head. Compatible with OEM parts. Will fit as a replacement for OEM 18222-83.

Jims, lower valve spring collar set. Chromoly

#978089

Stock:Yes

Chromoly. Dimensions: .060" thick x .585" I.D and 1.550" O.D. Jims chromoly steel lower collars are custom machined to prevent harmonic vibrations in the springs caused by the lower collar moving in the head. Compatible with OEM parts. Compatible with OEM parts

Jims, lower valve spring collar set. Chromoly

#978583

Stock:Yes

OEM style replacement steel top collars for use in OEM applications. USA made. Repl. 18221-36.

Upper valve spring collar set. steel. std

#910648

Stock:Yes