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Wiseco Pistons
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Wiseco Pistons - Mini Cooper
Includes: moly coated skirts, rings, wrist pins & circlips.
(* = Custom, Non-coated, NOT supplied with rings. Order RINGS separately HERE)
Wiseco Sport Compact Pistons are made from dedicated forgings produced in-house to give you a light weight piston with superior strength and optimal design. Being the multivalve piston technology leader, the line features specially designed valve pockets, complex dome and crown shapes, the steel nitride/napier xx rings and optimized skirt profiles. The pistons come standard with our ArmorGlide® coating material for reduced friction and noise, freeing up horsepower.
Stocking Shelf Pistons Come Complete With:
  • Aerospace grade materials, forged for maximum strength.
  • Precision tolerance CNC machining for quality, repeatability and performance.
  • Crown thickness and ring lands designed for power adders such as forced induction (turbos & blowers) and nitrous oxide. (Note: High comp. pistons are generally designed for nat. aspirated engines)
  • High Quality Piston Rings featuring positive twist nitride steel top ring, Napier 2nd ring, and nitrided rails on a specially designed expander for the best oil control.
  • Wrist Pins constructed of chrome moly steel material for the ultimate in strength.
  • Honed/Reamed pin bore holes for a precise tolerance fi t between wrist pin and piston.
  • Wire Retainer Clip Lock, featuring chrome silicon material for the ultimate yield strength.
  • Piston deburred for performance and reliability.

Mini Cooper S - Tritec 1.6L 16V Supercharged  2002-06
Part # Price/
Oversizes Stroke Rod C.H. Head cc's Dome/Dish
Comp Ratio Pin
Notes Buy Now
K618M77 $519* 77.00/3.031 Std 3.778 5.117 1.043 - F/T 0 8.5 - 1,3
K618M775 $519* 77.5/3.051 .020 85.8 131.5 26.5 - F/T 0 8.5 - 1,3
* Non-coated, not supplied with rings (you can order RINGS separately here)
Most Wiseco Pistons have an offset pin. Pins must be offset same as OEM for quietest operation.
2 This piston is a flat top w/out valve pockets, to be used if verifying piston to valve and piston to head clearance.
3, B or * = Build to order (custom), Non-coated, not supplied with rings.
4 = This piston made w/stock compression height, which is very close to cylinder head. Use Cometic thick gasket if decking block.
A = Piston Rings need to be adjusted
B or *
= Will build to order (custom), Non-coated, not supplied with rings.
E = With valve pockets unline K557M series.
H = Based on Volvo rod 23mm. Ford OEM 21mm
R = Pin 20mm, OEM = 20.65mm (13/16)

Notes that apply to all Part #'s:
  • Some pistons are listed with a range of compression ratio's. The low number is determined w/an un-cut deck and the high number is determined w/.030 piston to cylinder head clearance.
  • Always check pistons to valve clearance - If using VTEC or like mechanisms- check w/longer duration higher lift lobe.
  • Always run at least .030 piston to head clearance including gasket thickness.
  • If piston appears to be different than expected, please do not hesitate to call Wiseco at 800-321-1364 to verify proper installation specifications.
Sales/Tech Line: (603) 378-0090
Email: [email protected]

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*All prices on this site are subject to change without notice. Import Performance Parts™ disclaims responsibility for any printing or typographical errors, and does not guarantee that all information is accurate.

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