OUR RADICAL NEW DESIGN MAKES ULTIMATE POWER!

Our APPLE BITE FIRE GROOVE is a radical new feature.  This concept gathers 80% of the fuel/air charge DIRECTLY UNDER THE SPARK PLUG where the flame front has minimal distance to travel.

We originally discovered the Apple Bite after a rash of bad racing fuel caused us to hole pistons directly under the spark plugs.  We made a notch in the dome to increase the distance from the spark plug and it made a difference in power!  (One learns that racetrack vendors are sometimes guilty of cutting the race fuel with pump gas).  This Apple Bite can save you a burned piston.

NOTE:  All of our other designs are "universal" pistons that "bolt in" with no concern for clearance in all but the most severely milled heads.  Conversely, our "ultimate" pistons are custom fitted to each chamber and piston/valve clearance must be verified.  Heads milled more than .020" may require increasing clearance.  We furnish a can of Play Dough and instructions for checking and increasing clearance if necessary.

This piston set includes upgrade to superlite wrist pins (77grams) and Total Seal conventional rings.

ULTIMATE FEATURES

• This transverse groove also allows better scavenging of exhaust gas at overlap.  At TDC the groove acts as a conduit from intake to exhaust ports.
• Four different dome shapes are required to match the different offset of the valves and spark plugs.  The precise location of the apple bite under the spark plug centralizes combustion mixture with flame, front travel only 20mm.  Complete combustion is achieved for ultimate power. 
• Each dome is shaped to fit each of four chambers with minimum clearance.  This creates a dramatic "squish from hell" that swirls the mixture and rapidly spreads the flame front. This promotes flame front dissipation, complete combustion and incresed power.
• Top ring groove are gas ported to pressurize the area behind the ring.  This increased sealing pressure against the cylinder wall increases dynamic compression for increased power.
• Superlite weight is only 362 grams with CNC under head milling.  This is the lightest piston on the market.

          WEIGHT 415g -- JE STANDARD

          WEIGHT 382g -- COSWORTH

          WEIGHT 402g -- MAHLE

          WEIGHT 470g -- BORGO

• Large diameter valve reliefs will accommodate 46mm intake and 41mm exhaust valves.
• Deeper valve reliefs will accommodate the most aggressive race cam profiles.

          NOTE:  Compression of 12.5:1 measured with standard head of 112 mm height and 1.4mm gasket.

 You should consider the following upgrades:

• Total Seal gapless second ring set for more HP.  $129.00 extra. 
• Total Seal gapless top ring set for even more HP.  $159.00 extra.  (Check out HP gains at Total Seal HP Gains).
• Ceramic dome heat coating with Teflon skirt friction coating $239.00.