SKU: 80995738496

Supertech Performance SPRK-H1020D/SR20 Dual Valve Spring 116@ 40.5 SPR-H1020D/SR20 +RET-NSR20/T1 + SEAT-SR20/6 (For DET use SEAT-H/N240 on Exhaust

Sale price$273.40 Regular price$303.78
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Ships within 48 hours · Estimated delivery Aug 30 - Sep 4

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Description

Supertech Performance SPRK-H1020D/SR20 Dual Valve Spring 116@ 40.5 SPR-H1020D/SR20 +RET-NSR20/T1 + SEAT-SR20/6 (For DET use SEAT-H/N240 on ExhaustSupertech Performance SPRK H1020D SR20 Dual Valve Spring 116@ 40. 5 SPR H1020D SR20 +RET NSR20 T1 + SEAT SR20 6 (For DET use SEAT H N240 on Exhaust Supertech valve springs are computer designed to ensure smooth harmonics under high RPM and load. The stress levels are kept under control and fatigue is reduced for long durability under extreme conditions. These springs are made of premium Superclean Chrome Silicon Vanadium steel alloy, which is a tough

Supertech Performance SPRK-H1020D/SR20 Dual Valve Spring 116@ 40.5 SPR-H1020D/SR20 +RET-NSR20/T1 + SEAT-SR20/6 (For DET use SEAT-H/N240 on Exhaust

Supertech valve springs are computer designed to ensure smooth harmonics under high RPM and load. The stress levels are kept under control and fatigue is reduced for long durability under extreme conditions. These springs are made of premium Superclean Chrome Silicon Vanadium steel alloy, which is a tough alloy that was designed for higher performance and durability at high RPM's and memory retention.

Specufications:

  • Outer Spring O.D.: 30.00mm
  • Outer Spring I.D.: 21.80mm
  • Inner Spring O.D.: 21.30mm
  • Inner Spring I.D.: 15.50mm
  • Seat: 116 @ 40.5 (lbs@mm)
  • Open (lift): 275 @ 12.0 (lbs@mm)
  • Max net lift: 15.00mm
  • Coil bind: 25.50mm
  • Rate: 13.20 lbs/mm

Retainer P/N: RET-NSR20/T1 (16) + SEAT-SR20/6 (8 for Intake) + SEAT-H/N240 (8 for Exhaust)

Note: This is for a complete set of dual intake and exhaust valve springs. Retainers and spring seats are included if they are part of the kit.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 80995738496

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Nate
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★★★★★ 5
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Size: Small, Color: Black
Love the simple style but very elegant. Fit perfectly, I'd say worth of buying, warm you up Good quality. Not too heavy. Good price as well.
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Reviewed in the United States on August 26, 2025
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Linda Schmidt
New York, US
★★★★★ 5
My husband loves it!
Size: Large, Color: Black
My husband loves it! Likes the look and quality.
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Reviewed in the United States on January 22, 2026
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Bri
Pawtucket, US
★★★★★ 5
Great style; unique; fits well.
Size: Medium, Color: Gray
Love the style and the fit. I get a lot of complements wearing this. With only three buttons, wearing this outdoors in the cold might not be practical. Other than that, I like it. I went back and ordered a second coat but in a different color.
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Reviewed in the United States on January 7, 2026
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Fremy
Fort Morgan, US
★★★★★ 4
Nice, mid-length trench coat for style and comfort...
Size: X-Large, Color: Black
I like this mid-length trench coat. The seams are good (on the one I got) and the style is perfect for the office, semi-formal occasions and all-around wear. The fit is good, and the only complaint I would have is the sleeves are a bit too short for my long arms.
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Reviewed in the United States on February 9, 2023
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Sharon
Alexandria, US
★★★★★ 3
It’s ok
Size: X-Large, Color: Gray
This jacket is OK. I bought it for my boyfriend because I really like the coat collar but once it got here. The front fits well but I think the back needs a little more tailoring because it kind of sticks out but he really liked it. He said he could put a heavy sweater up under it. That way he can get more ware out of it. It’s OK.
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Reviewed in the United States on July 21, 2024

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