These forged pistons are designed by Edge, made by Ross to fit Buell & XL EVO engines. This is both a race and high-end street piston capable of 10.8:1 to 11.5:1 compression ratios depending on the thickness of the base & head gaskets used in assembly. Positive-quench piston dome will match basic stock heads and valve angles. Large valve relief cut into piston cuts for running larger valve sizes (up to 1.900 Intake, and 1.650 Exhaust), and high lift cams. Increased air/fuel flow is crated by the piston providing good flame propagation across the piston top for a clean burn with a single plug setup.

Improved skirt design with oil holes cut into the piston skirt improves oil control, enhancing the low friction coefficient on the torque side of the piston, which results in greater lubrication. This minimizes piston scuff from not warming up motors (also known as cold seize).

Figure 1. Edge piston showing lubracation holes in skirt. Lightweight matched pistons come with stronger, lighter wrist pins (than stock), wire clips, and Ross racing ring sets which include a specially treated first ring that is barrel lapped with a high density molybdenum faced that seats quickly and holds it seal. The second ring has a reverse torsional twist, taper face, cast iron design. Both the first and second rings are zinc-phosphate coated. The oil ring is a standard tension three-piece type with stainless expander, chromium plated rails, and low radial depth. Optional titanium wrist pins are also available to the serious race enthusiast for $100.00 as a replacement for standard pins.

Figure 2. Edge pistons with Ross rings Price for this package is $393.63 per set NOTE: This product is only as good as the builder. ALL tolerances MUST be checked and maintained to proper specifications! Please don’t buy this product unless you have all the installation information required (not included in kit but found in most repair manuals). If you need more information, please contact us. Tell you what, just feel free to contact us about any product you are interested in. MCmod.com. All prices subject to change. A word about Edge Head Parts and Design--------- Bill Malinchok brings innovation to the racing industry. He is the “best kept secret” in the business due to many in the race industry who are not letting you know about what they are doing to win.

Cometic S.C.M.L.S. (Special Cut Multi-Layer Steel) Head Gasket Made exclusively for Edge by Cometic, these head gaskets are crafted by combining two HTV coated spring steel layers over a middle layer for a three piece head gasket. Specially cut a fraction larger to better tolerate extreme temperature changes that create rapid thermal expansion. They are custom made by HTV coating a mill thicker than standard with embossed outer layers for better sealing that protects against all leaks (no o-ring seals are necessary). These gaskets are for building higher compression motors with Edge technology. Multiple sizes are offered for motor set up to the desired tolerance.

Part# E9688 for 3 ½ Bore - .030 Thick. Cometic Single Piece Metal HTV (High Temperature Viton) Base Gasket
These special cut HTV coated embossed steel base gaskets work with the three piece head gaskets to maintain dimensions that stay correct between torqued down cylinder surfaces. These are the best sealing cylinder gasket sets available today. Multiple sizes offered to set up motor with desired tolerances. for 3 ½ Bore - .020 or .030 Thickness.
Cometic Single Piece Metal base Gasket As cylinders are torqued down this NBR coated metal base gasket works with 3 piece head gasket to maintain the correct dimension between surfaces creating the best sealing set of cylinder gaskets available today. Multiple sizes offer to set up motor with desired tolerances.

Cometic Multi layer Steel Head Gasket Two NBR coated metal gaskets sandwich a middle layer for a three-piece head gasket that’s more tolerant to thermal expansion. No O-ring oil seals are needed. These gaskets are for building higher compression motors on the cutting edge of technology. Multiple sizes offer to setup motor with desired tolerances.

Any questions please ask mark@mcmod.com