for Shovelhead

Primarily designed for stock replacement applications where traditional looks and improved performance are important. These cylinder heads are made from the same high-quality aircraft-cylinder head material like the Evolution heads. The intake port is the same diameter and is positioned in the same location as stock which means stock manifolds bolt right up. A directional vane like the one used in S&S Evo heads to route the air around the valve stem and guide area is located in the floor of the port. Standard intake valve diameter is stock at 1 15/16“. The combustion chamber is identical to stock enabling installation on any engine with hemispherical domed pistons. The exhaust port is also stock configuration and readily accepts stock style exhaust systems. Standard exhaust valve diameter is also stock at 1 3/4“. The pre-installed .590“ lift valve springs are used for greater cam lift versatility, the valve seats are compatible with present day unleaded fuel. Although these heads for Shovel big Twins are designed for stock replacement applications, flow characteristics have been improved up to 9% more flow. S&S Shovelhead cylinder heads easily bolt on and fit like stock. Frame and other clearancing problems are non-existent. Exhaust systems with stock dimensions can be used. Stock rocker cover assemblies are not included and are installed using hardware provided. They are available as stock replacement and as a 2-plug version for 3 5/8” Big Bore cylinders. Each High Output Super Stock Shovelhead cylinder head kit includes front and rear cylinder heads completely assembled with valve seats, valve guides, valves, valve springs, spring collars, valve keepers and valve guide seals ready to run. Also included are gaskets required for installation including cylinder base and head gaskets, rocker cover and exhaust port gaskets, rocker cover and exhaust pipe mounting hardware and installation instructions.

Restore that tired iron! S&S has something for Shovelhead engines that are in need of a new top end. In a lot of cases it just isn’t worth it to try to rebuild the old, cracked, worn out cylinder heads or to bore the stock cylinders again. The S&S Shovelhead style top end kits provide everything you need to replace the top end of a 74“ or 80“ Shovelhead engine. They include pistons, rings, cylinders, cylinder heads, gaskets and hardware. Valves and springs are pre-installed and pistons are pre-fit to the cylinders, so there is no machine work to be done and very little down time. Kits for 74“ engines come with o-ring style cylinder heads, those for 80“ engines come with band style heads. Compression ratio for both top ends is 8:1. Since the kits are not interchangeable it is important to correctly identify the stroke of the engine before ordering.

Just the fact that the S&S polished billet rocker covers for Shovelhead engines look so good may be reason enough to put them on your bike, but the beauty is not just skin deep. The well thought out design offers a number of advantages over conventional cast rocker boxes. Machined from billets of 356 aluminum, these rocker boxes provide the ultimate in stability and accuracy. The top and bottom sections of the covers are sealed with an o-ring type seal that insures leak free operation. Rocker shafts used in the S&S rocker boxes are a strong and economical straight design and anyone who has had to replace a set of stock shovelhead rocker shafts can tell you that this will save you money when it comes time to rebuild the top end. Clearanced for valve lifts of up to .590“.

Knucklehead-style rocker boxes for all Shovelhead engines. It is stupendous how effectively the right side engine appearance is changed and how fast your good old Shovel will become a center conversation piece on every bike meet. Installation is very simple due to exact fitment. No additional parts are required because the complete stock valve train can be retained. However, installation of the Knovelhead rockerboxes requires new oil lines. The manufacturer offers a nice solution: two braided steel lines with T-fitting made from billet aluminum, including all necessary fittings..

The Knovelhead sytele rocker boxes require special oil lines which are available in a stock-like rigid version as well as flexible custom braided steel lines.

Complete set of rockerbox and motor mount studs for one cylinder head.

The red dot nut was stock equipment.

Split type rocker box oil line kits which will give your Shovel powerplant that old style appearance. All lines are pre-bent and ready to install, with all nessary fittings.

These are the alternatives by JIMS: Shovelhead Roller Rockers with a slightly higher ratio of 1.50 : 1 that yields more valve lift (stock on 1980-84). Cast from 4340 chrome moly steel then heat treated and equipped with precisely fit bronze bushings for stock rocker arm shafts. Segmented parabolic pushrod cups reduce friction at the pushrod ends and allow full oil pressure at the tip. The valve side features a roller tip made from bearing grade material to mimimize valve guide wear and valve tip galling.

This kit was engineered to reduce rocker arm clatter and oil leaks from the rocker shaft end plugs. The Ram Jett Kit comes with special seal rings and wave washers for pre-load adjustment of rocker arms.

Stock replacement rocker arm bushings for all 1966→ Big Twins and 1957→ Sportster models.

Stock replacement rocker arm bushings made from top notch Mil Spec bearing bronze for all 1966→ Big Twins and 1957→ Sportster models.

The most common reason for noisy rocker arms is too much side-play. These shims are a fast and easy way to solve this problem.

Replacement rocker arm washers and O-rings. Complete set for two cylinder heads.

Roller rocker arms that were designed for superior strength to eliminate the failure-prone stress areas and to reach higher rpm with reduced side thrusting. S&S roller rockers are forged from 4140 steel, heat-treated, and then shot-peened for additional strength and protection from fatigue. Rocker ratio is exactly 1,5:1. They feature 3/4” long bronze bushings which provide 50% more load bearing surface for improved longevity. Additional roller tip oiling can be achieved with S&S Quickee pushrods and lifter blocks. Each kit includes 2 front and rear rocker arms. Shafts have to be ordered separately, existing stock shafts can be retained.