Cylinder Heads & Parts – Evo – Quality Customs

Head Bolts with Polished 12 Point – Chrome. Fits Evo Big Twin 1985-1991, Sportster 1986-1992 & S&S Heads. – Colony Machine

Tue, 11 Aug 2026 17:20:50 +0000

Features & Benefits:-

* Custom Look.

* Polished & Chrome Plated, 12 Point Dome Top Headbolts.

* Replaces OEM 16480-85A & OEM 16478-85A

Proudly Made in the USA by Colony Machine !

Valve Spring Kit. Fits Big Twin 1984-2004, Sportster & Buell 1986-2003. Beehive Springs with .600in. Lift. – AV&V

Tue, 04 Aug 2026 17:32:37 +0000

Note: Maximum Recommended Lift = .600″

* Beehive steel valve spring kit

* Ultra pure chrome silicon+Nickle spring wire

* Extra processing for fatigue resistance

* Resist pressure loss & fatigue associated with extremely aggressive cams in high compression engines

* Reduce vibration & harmonics

* Includes springs,retainers & upper & lower collars

* 162lbs @ 1.860″, 340lbs @ 1.260″

* Coil bind 1.200″

* Small end ID = .650″, OD= 1.085″

* Large end ID = 1.000″, OD = 1.445″

* CNC machined keepers

Tech Tips:-

* Rocker box clearance must be checked

* Spring travel must be checked

* Valve timing must be accurate

** Over revving will lead to pre-mature failure of Valve Springs & collars.

Intake Valve. Fits 89cc or 91cc S&S Heads. – S&S

Mon, 03 Aug 2026 17:34:10 +0000

Features & Benefits:-

* Replacement intake valve for S&S Super Stock heads.

* Fits Big Twin 1984up, Sportster 1986-2003 & S&S X-Wedge.

* 2.000″ x 4.450″ @ 1.943″ Gauge.

* Sold Each.

Proudly Made in the USA by S&S Cycle !

Head Bolt Covers. Fits S&S Head Bolts. – S&S

Sun, 02 Aug 2026 17:16:18 +0000

Features & Benefits:-

* Fits Big Twins 1984up & Sportster 1986–2003.

* Magnetic Covers.

* Fits S&S Head Bolts Only.

* Sold as a Pack (4).

Proudly Made in the USA by S&S Cycle !

585in. Lift ECONO Performance Beehive Valve Spring Kit. Fits Big Twin 1984-2004, Sportster & Buell 1986-2003. – Feuling

Thu, 30 Jul 2026 17:37:42 +0000

FEULING ECONO performance BEEHIVE valve springs designed to handle up to 585 lift camshafts at an economical price. These FEULING BEEHIVE springs are made from the same premium stress relieved conical ovate wire as our HIGH LOAD springs but are developed for economical engine budgets. They have an excellent level of fatigue life and are designed to handle the demands of performance engines with 585 and smaller lift camshafts. Dyno proven and track tested.

FEULING BEEHIVE valve springs use a much smaller and lighter weight retainer which drastically reduces the valve weight creating a much quicker revving and smoother motion than comparable dual valve springs.

Kits include: FEULING ECONO BEEHIVE valve springs, lightweight steel retainers, machined heat treated chrome moly spring seats, seat shims, valve locks and a set of premium Viton valve seals equipped with a spring loaded valve stem wiper system.

Valve Guide Seals. Fits Big Twin 1984-2004 & Sportster 1986-2004. – James Gaskets Inc

Sun, 26 Jul 2026 17:36:20 +0000

Features & Benefits:-

* Replaces OEM # 18001-83A

* Sold as a Pack (4).

Tech Tips:-

* 5/16″ Valve Stem Application.

Proudly Made in the USA by James Gaskets !

Head Alignment Dowel – Pack of 4. Fits Evo 1984-1999 & Sportster 1986-2021 – Kibblewhite

Sun, 26 Jul 2026 17:22:45 +0000

KPMI cylinder alignment dowels are machined from steel and receive a black oxide surface treatment. OEM Cylinder Alignment Dowels are often galled and distorted when removed during a top end job. Attempting to straighten and clean the OD of the old dowels is a time wasting, money loosing operation. New KPMI steel dowels make , a quick, clean, easy, and accurate reassembly.

* Sold as a Pack (4)

* Replaces OEM # 16573-83

OEM Style Valve Guide Seals – Viton. Fits Big Twin 1984-2004, Sportster & Buell 1986-2003 – Kibblewhite

Thu, 23 Jul 2026 17:44:32 +0000

KPMI Red 100% Viton valve stem seals are designed to have optimum fitment, allow , maximum lift, and to give maximum life. KPMI Red valve stem seals are resistant to high temperatures, petroleum products and the corrosive gasses that are the by-products of combustion.

* Replaces OEM # 18001-83

Valve Kit. Fits Evolution Big Twin 1984-1999 – Kibblewhite

Mon, 20 Jul 2026 17:36:54 +0000

Kit Includes:

* A Full Set of KPMI Stainless Steel Black Diamond Valves (Stock Head Diameter)

* All KPMI Black Diamond Stainless steel valves are impregnated by a special German process to a depth of .002, with a surface buildup of .0002. This process improves wear properties, reduces friction, and provides resistance to corrosion and wear. Each valve is designed using Finite Element Analysis software, and profiles are tested on our computerized flow bench.

* Replaces OEM # 18074-83 & 18082-83

Suggested Additional Purchase:-

Top End Gasket Kit # CG-C9747 or CG-C9635

Electric Compression Release Assembly. Replacement for Kit # SS90-4915. – S&S

Mon, 20 Jul 2026 17:27:23 +0000

Features & Benefits:-

* Includes white silicone cap.

Proudly Made in the USA by S&S Cycle !