SPI Piston Kits For POLARIS 550 SUPERSPORT 1999-2008 73.25MM Big Bore

Description:

• This bore is 0.25MM bigger than stock

• Engineered to provide the best possible path for combustion chamber heat transfer to the cylinder walls
• All of our pistons, rings. pins and circlips are manufactured to OEM specifications
• All individual components are interchangeable with original parts
• Piston weight is comparable with original piston

WE ARE PROUD TO BRING YOU THE NEXT STEP IN THE EVOLUTION OF PERFORMANCE POWERSPORTS PISTONS. OUR NEWEST LINE IS MADE FROM A SPACE-AGE ALUMINUM ALLOY WHICH MAINTAINS IT'S HIGH TENSILE STRENGTH UP TO 700°F ( 380°C), 50% HIGHER THAN A CONVENTIONAL CAST PISTON. THIS HIGH TEMPERATURE RESISTANCE SIGNIFICANTLY IMPROVES FATIGUE STRENGTH AND IMPACT TOUGHNESS, WHICH MEANS THAT WE WILL KEEP YOU RIDING LONGER AND HARDER THAN THE COMPETITION.

A machined smooth piston crown should reflect combustion heat while reducing carbon buildup and protecting the top of the piston. Some tests have shown that a machined smooth head can in crease HP and fuel economy by up to 6%.

Brand: SPI
Part Number: SM-09256-1

Fitment:

• 2003 POLARIS 550 CLASSIC EDGE
• 2005-2006 POLARIS 550 CLASSIC, F/C
• 2007 POLARIS 550 EDGE LX
• 2014-2021 POLARIS 550 INDY 121/144/LXT
• 2014-2021 POLARIS 550 INDY ADVENTURE/LXT/ES ALL
• 2019-2021 POLARIS 550 INDY EVO
• 1999-2005 POLARIS 550 INDY SPORT TOURING
• 1999-2006 POLARIS 550 INDY TRAIL RMK
• 2000,2003-2004 POLARIS 550 INDY TRAIL TOURING
• 2003-2004 POLARIS 550 INDY TRAIL TOURING
• 2011-2013 POLARIS 550 IQ LXT
• 2009-2013 POLARIS 550 IQ SHIFT
• 2007-2008 POLARIS 550 LX
• 2020-2021 POLARIS 550 LXT
• 2004 POLARIS 550 PRO X FAN
• 2020-2021 POLARIS 550 RMK EVO
• 2011-2013 POLARIS 550 SHIFT
• 1999-2008 POLARIS 550 SUPERSPORT
• 2017-2018 POLARIS 550 VOYAGEUR 144/155
• 2017-2020 POLARIS 550 VOYAGEUR 144/155
• 2016-2018 POLARIS 550 WIDETRACK /LX
• 2016-2019 POLARIS 550 WIDETRAK / LX
• 2003-2004 POLARIS INDY 550 CLASSIC
• 2000-2010 POLARIS TRAIL RMK
• 1999 POLARIS TRAIL SKS EURO
• 2005-2010 POLARIS TRAIL TOURING

Note: Image is for reference only, actual product may vary slightly.