| Make | Model | Year |
|---|---|---|
| Harley Davidson | Dyna Wide Glide | 1993, 1998 |
| FLHP Electra Glide Police | 1984 | |
| FLHTC Electra Glide Classic Anniversary | 1993 | |
| FLHTCI Electra Glide Classic Anniversary | 1998 | |
| FXB Sturgis | 1984 | |
| FXR2 | 1999 | |
| FXR3 | 1999 | |
| FXR4 | 2000 | |
| FXRP Super Glide Police | 1986-1990 | |
| FXRS Low Glide Anniversary | 1988 | |
| FXRS-Conv Low Rider Sport Convertible | 1989 |
Front Flat Top Piston (4201B+010) by Sputhe®. All pistons are machined from zero silicon, high nickel T7 stabilized aluminum forgings. The cam and barrel taper skirt configurations were developed by CTEM (Computer Thermal Expansion Modeling). A conventional piston grinder cannot produce these compound curves. A CNC single point diamond-contouring machine forms the skirts to a tolerance of fifty millionths of an inch. This results in a perfectly cylindrical skirt at operating temperature with optimum clearance for quietness and minimum friction. Long full width skirts provide maximum stability for a superior ring seal.
Installation
Some heads need small crescents of weld to the head boltholes to provide a sealing surface against the "O-ring" head gasket.
On late type studs, the flange below the threads must be removed. Early engines with female studs and head bolts must be converted to the 1986 and up male studs and tube nuts.
If a product you buy bears the name Sputhe®, you can be assured that Sputhe made it and that Sputhe will back it with knowledgeable technical assistance, service and spare parts. A production machine shop that employs the latest CAD-CAM technology and is equipped with the most advanced American made CNC machining centers and inspection equipment. All of product development and prototype testing is done in-house. Sputhe is able to respond to new developments more quickly and with better products than competitors. Since Sputhe doesn’t have to rely upon outside vendors, Sputhe is able to exercise much greater control over the quality and production scheduling of products than competitors can. Sputhe company name has long been known for providing the very best in high performance equipment.