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- USA
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Ships within 48 hours · Estimated delivery Jul 4 - Jul 9
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Description
Supertech Forged Piston Kit - Nissan RB25Supertech pistons are manufactured from extruded high silicon, enhanced 4032 alloy that low thermal expansion, excellent wear resistance and higher thermal conductivity. A phosphate dry lubricant coating is applied to pistons to protect against ring micro welding and enhance skirt lubrication. Features Forged from enhanced 4032 alloy and CNC machined Contact reduction grooves are standard Honed & reamed pin bores and precise fit High tensile strength
Supertech pistons are manufactured from extruded high silicon, enhanced 4032 alloy that low thermal expansion, excellent wear resistance and higher thermal conductivity. A phosphate dry lubricant coating is applied to pistons to protect against ring micro welding and enhance skirt lubrication.
Features
- Forged from enhanced 4032 alloy and CNC machined
- Contact reduction grooves are standard
- Honed & reamed pin bores and precise fit
- High tensile strength and evenly distributed hardness
- Withstands up to 42psi of turbo boost, w/alcohol, w/out any problems
- A 2 or 3 forging steps process yeilds a fine structural grain oriented in fibers in the same direction of the stresses.
- Wrist pins are constructed or cold extruded chrome molly steel for high strength to be used with the wire clip locks.
- Quality Control is performed after every step of the manufacturing process in climate controlled environments to ensure reliability of dimensions
- Rings, wrist pins, and wire locks are included.
Nissan RB25 Bore & Compression Ratio Options:
- 86.50mm / 9.1cr
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.4 ★★★★★
Based on 103 reviews
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Product Reviews
★★★★★ 5
Great quality very comfortable
Size: Large, Color: White
100% the best cotton shirt I’ve bought in a very long time loved it so much. I bought the black after I bought it. I started looking at other colors.
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Reviewed in the United States on May 24, 2026
★★★★★ 5
The way it fits
Size: XX-Large, Color: White
Great my husband loves the shirt , it fits him so comfortably. And loves it all cotton . Thumbs up
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Reviewed in the United States on May 16, 2026
★★★★★ 4
Fair quality all cotton Oxford with wide choice of colors
Size: Small, Color: Sky Blue
This is real oxford cloth with the warp dyed and weft left white. It's actually 100% cotton. I've ordered several other "100% Oxford" shirts on Amazon that were not. Amazon's own Essentials brand OCBD is better than this Cotton King brand and only half the price, but it is not offered in even a fourth of the colors. I like all the pastels. Amazon's "Stretch" version is not Oxford cloth or cotton at all. These Cotton King shirts are a bit lighter weight than the non-stretch cotton Amazon Oxford shirts which are about the same weight as the original Brook's Brothers or Lands' End "Sail Rigger Oxford" which is their current heavyweight oxford as well as their "Hyde Park" Oxford from the past.
The Brooks Brother's USA-made Oxfords may be worth it, but I don't have a use for them. Their imported "Friday" Oxfords are just overpriced. Lands' End has been changing their sources and the fit is inconsistent often with sleeves that are too short and very few color choices. The all-cotton Amazon Oxfords are at least as good as the Lands' End and Brooks Brothers Friday shirts, sell for as little as Lands' End's lowest sale prices, and fit better, but the color choices are few. I've only bought these Cotton King in a few colors the others aren't offering. They're more expensive, but still half the price of the Friday shirts and worth just as much.
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Reviewed in the United States on June 2, 2026
★★★★★ 5
Nice casual shirt
Size: XX-Large, Color: Sky Blue
Great shirt. The size is right. The color is as expected. Comfortable. Didn't iron it yet, so can't tell how easy it is.
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Reviewed in the United States on April 21, 2026
★★★★★ 5
Good shirt
Size: Small, Color: Black
Needed a shirt for a funeral. Arrived quickly. Fits great. Material feels good and not cheap.
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Reviewed in the United States on April 4, 2026