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BMW Mini Cooper
Swiftune Performance Piston Set, 1275cc, +.040

Swiftune Performance Piston Set, 1275cc, +.040

Swiftune Performance Piston Set, 1275cc, +.040
Specially Priced Item
Internet Price $509.95
Part No: C-STN103-40
Internet Price $509.95
These Swiftune die cast performance pistons are part of their new Heritage range and are manufactured by a global leading piston manufacturer with German heritage. These pistons have been developed using their 50 plus years of experience. Glyn Swift was using die cast pistons in the early '70s in the build of many competition A Series engines. These Heritage pistons go back to old school methods, offering high quality die cast and industry standard NPR ring pack. The same ring pack which is found in all of Swiftune's race engines. These pistons are available in +20, +40 and +60 and are for high performance road, clubman competition, rally, sprint, hillclimb and trackday. All at an affordable price.

This is a 1275cc +.040" set of four (4) pistons.

Tech spec:

• High silicone hypereutectic alloy

• Forced Pin oiling • 6.5cc bowl

• 2mm bowl offset

• 38.05mm compression height

• 59.65mm total length

• 1.2mm NPR Japan steel nitrided top ring

• 1.2mm NPR Japan cast second ring

• 4.0mm NPR Japan steel Nifflex oil ring

• Running clearance 0.06mm (0.0025”)

• 60.0mm x 20.638mm pin size (press fit pin)

• Case hardened pin to 57-65 HRC

• Circlip grooves for floating pin (pin optional)
I had a question regarding the offset dish on these pistons. What purpose does the offset serve and what direction do these pistons get installed into the cylinders? I don't see any markings in the picture that denote the "front".
I believe the offset centers the piston dish more directly below the combustion chamber for better compression and Hp gain. In looking at the picture it appears that the blocky line under the size markings in the orientation marker.

Mini Mania Tech Team

The Classic Mini Parts and Accessories Experts

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