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USA
- USA
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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
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Description
Supertech Forged Piston Kit - K-series (K20A-Z)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
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.
K20A/A2/A3/Z1/Z3 Bore & Compression Ratio Options:
(Note: add +.07cr with K20A3 head)
- 86mm / 9.0cr
- 86mm / 11.2cr
- 86mm / 12.0cr
- 86mm / 12.5cr
- 86.5mm / 9.0cr
- 86.5mm / 11.2cr
- 86.5mm / 12.1cr
- 86.5mm / 12.5cr
- 87mm / 11.5cr
- 87mm / 12.5cr
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
4.0 ★★★★★
Based on 227 reviews
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Product Reviews
★★★★★ 5
Feels like expensive moisturizer
Size: 1.7 Fl Oz (Pack of 1)
non sticky sun protection! can use in humid weather, feels like good mositurizer hydrating your skin. No white cast. Used during my DR trip and it protected skin from harsh sun.
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Reviewed in the United States on May 7, 2026
★★★★★ 4
One of the better American sunscreens
Size: 1.7 Fl Oz (Pack of 1)
One of the better sunscreens you can get in the U.S. for an affordable price. Neutrogena’s facial sunscreens can be a hit or miss, but this is their better ones. I’m used to using Asian sunscreens that feel like a light moisturizer or serum on the face so I’ve been spoiled.
It’s nice to find an American sunscreen that is spf 50+ with no white cast that also feels lightweight, non-greasy, and doesn’t sting my eyes. This sunscreen fits the bill. I used four pumps of product to cover my face to get proper coverage. I could have used a little more tbh. The serum is a very light beige and a bit watery in texture. It blends out invisible as advertised. The finish is shiny and a little greasy looking at first, I’ll admit, but it dries down to a natural finish. I did use a Korean toner pad before applying the sun serum. The end result with the Neutrogena sun serum is a natural finish with a subtle healthy glow in 70 degree weather. It does sting my eyes when I sweat or exercise though. One star off for that. Also it does not pill under makeup.
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Reviewed in the United States on April 18, 2025
★★★★★ 5
Great SPF for daily use
Size: 1.7 Fl Oz (Pack of 1)
Wonderful for daily use and for under makeup! I love the feel of this SPF. Leaves a nice hydrated feel and makeup goes on top of it perfectly. I have been more compliant with wearing sunscreen everyday since I purchased this. Give it a try!
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Reviewed in the United States on May 26, 2026
★★★★★ 5
This SPF 60 makes for an effective moisturizer.
Size: 1.7 Fl Oz (Pack of 1)
Love this stuff. Definitely moisturizes as it's protecting. Only thing, am unable to put around my eyes, as it stings, so will have to find something else to protect the sensitive eye area from the sun. Love the compact size as well and you only need a one small pump for your face. It goes a long way.
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Reviewed in the United States on April 1, 2026
★★★★★ 3
Eyes burn but good for face
Size: 1.7 Fl Oz (Pack of 1)
This sunscreen is really light weight and gives me a glow without being to greasy and heavy. I love this sunscreen but it makes my eyes burn throughout the day
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Reviewed in the United States on May 14, 2026
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