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Ships within 48 hours · Estimated delivery Jul 24 - Jul 29
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Description
Supertech Forged Piston Kit - B-series B20/VTECSupertech 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.
B20/VTEC w/B16A "PR3" Head Bore & Compression Ratio Options:
(add +0.3cr w/GSR B18C1 "P72" head)
- B20 - 84mm / 9.5cr
- B20 - 84mm / 11.5cr
- B20 - 84mm / 12.5cr
- B20 - 84.5mm / 9.5cr
- B20 - 84.5mm / 11.5cr
- B20 - 85mm / 9.5cr
- B20 - 85mm / 11.5cr
- B20 - 85mm / 12.5cr
- B20 - 85mm / 13.5cr
- B20 - 86mm / 11.5cr
- B20 - 86mm / 12.7cr
- B20 - 86mm / 13.5cr
- B20 - 86.5mm / 13.5cr
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
4.6 ★★★★★
Based on 29 reviews
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Product Reviews
★★★★★ 5
Bought second one
Color: Navy, Size: Medium
I bought the black T-shirt about a month ago and really liked the quality the fabric is soft, the fit is great, and it holds up well after washing. So I decided to get the same one in dark blue.Very satisfied with the purchase
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Reviewed in the United States on December 9, 2025
★★★★★ 5
Fit me even better than I was hoping.
Size: XX-Large, Color: Beau Blue
I was all but convinced upon receipt I would be sending these back but they fit beautifully. The trick is understanding what the directions are trying to tell you.
I’m 6’4 with a 40 inch waist on traditional jeans (regular fit). I selected 2XL because my feeling was I would want and need a waist line that would fit me but not constrict me.
Admittedly my regular fits were getting close to not fitting as good anymore so I felt 2XL would give me that “extra” my regular fits were no longer affording me.
Comfortable at the waist(not too tight) and they fit me nicely all over. Perfect length. Colors look great too. The pictures shown are accurate. I’ll be ordering more. Give these a try! Definitely worth the money.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
amazing pair of jeans!
Size: XX-Large, Color: Dirty Blue
im 6'2, 280 currently , bought a 38/32 pair of, these jeans and will instantly look forward to buying more, just for comparison , the same day i got these i tried on a pair of levis i had just bought as well, the Levi jeans i got were also 38/32, and they were the 501's which are stretchy, but maaaan, let me tell you, the difference between those and these are night and day, these feel like i can run a mile in them and do whatever activities i choose to, its stretchy in all the right places, the crotch area isnt tight at all, these are incredibly breathable and in comparison to the levi's price , these are cheaper by $15 and they weren't even on sale, unlike the levis which were on sale by 15% and STILL costed $50. Will buy more ASAP. 10/10
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Reviewed in the United States on December 21, 2025
★★★★★ 5
stretch jeans
Size: Large, Color: Dirty Blue
These jeans because they are very comfortable. They stretch just the right amount without binding. I am female but wear men's jeans. These jeans ride lower so sometimes slide down. I ended up solving that issue by ordering a second pair in a smaller size. Worked perfectly. They stretch so no problem there, and now they stay up!
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Reviewed in the United States on March 18, 2026
★★★★★ 4
well made product
Size: Medium, Color: Beau Blue
i love these jeans they fit well, a little longer the described
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Reviewed in the United States on September 28, 2025