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Piston Set V-6 2.5 L Low Friction Asymmetrical Skirt Design See Details for Bore Size and Compression

SPECIAL ORDER -- 3-4 WEEK DELIVERY for bore sizes 88, 89, 90, 95mm with 10.5:1 compression.

(For other bore sizes or compression ratios, we can special order.  8 week delivery.  Add $340 and specify bore size/compression in "Customer Comment" box.)

NEW!  ASYMMETRICAL DESIGN.  This slipper skirt piston type design features:

  • The intake skirt is 20% narrower than a full skirt, rod angularity creates greater pressure on the intake side load before TDC.
  • The compression decay after TDC reduces the exhaust loading allowing a 40% reduction.


For all 12 valve 2.5 engines.  Fits the original 88mm bore liners.

  • 10.5:1 compression engines perform great and have no problems on 91-93 octane fuel.
  • Compression of 10.5:1 is measured with standard head of height and 1.4mm Reinze gasket. 

This piston set includes standard wrist pins  (109 grams) and conventional Ring Set. 

YOU SHOULD CONSIDER THE FOLLOWING UPGRADES:  (Specify upgrades in "Customer Comment" box when ordering online.)

  • Upgrade to light weight pins (77 grams) for an additional $120.00
  • Upgrade to Total Seal gapless second ring set for more HP.  $199.50 extra
  • Upgrade to Total Seal gapless top ring set for even more HP. $249.00 extra (check out HP gains at Total Seal HP Gains)
  • Ceramic dome heat coating and Teflon skirt coating $249.00 extra.  Dome coating holds heat in combustion chamber for more power. This ceramic shield prevents heat transfer to the underside of the piston and reduces oil temperature. Reduced skirt friction decreases parasetic HP loss.
  • Teflon skirt coating only $162.00 

For more information, please visit this product's webpage.
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Spruell Motorsport Alfa is your source for performance parts for Alfa Romeo.
We specialize in Alfa Romeo 101, 105 and 115 drive train products for engine and gearbox.
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