SKU: 8329725182

Adjustable Vacuum Advance for GM HEI Distributors - 31035

$50.62 $56.25
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 1 - Aug 6

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Description

Adjustable Vacuum Advance for GM HEI Distributors - 31035Overview: This unit permits a seamless wide range of adjustment to both amount and rate of ignition advance. This unit helps increase horsepower and throttle response. It provides maximum spark advance while preventing detonation or "pinging". This kit includes an allen wrench for easy adjustment along with instructions. Features: Adjustable Vacuum Advance Increases Horsepower And Throttle Response Includes Allen Wrench For Adjustments Application:

Overview:

This unit permits a seamless wide range of adjustment to both amount and rate of ignition advance. This unit helps increase horsepower and throttle response. It provides maximum spark advance while preventing detonation or "pinging". This kit includes an allen wrench for easy adjustment along with instructions.

Features:

  • Adjustable Vacuum Advance
  • Increases Horsepower And Throttle Response
  • Includes Allen Wrench For Adjustments

Application:

Year Make Model Submodel Engine Size
1976 Pontiac LeMans 455/7.5 V8
1975 - 1976 Pontiac Firebird 455/7.5 V8
1975 - 1976 Pontiac Grand LeMans 455/7.5 V8
1976 Buick LeSabre 455/7.5 V8
1975 - 1976 Oldsmobile Cutlass 455/7.5 V8
1975 - 1976 Oldsmobile Cutlass Supreme 455/7.5 V8
1975 - 1976 GMC G25 454/7.4 V8
1976 GMC G35 454/7.4 V8
1976 GMC Jimmy 454/7.4 V8
1976 GMC K15 454/7.4 V8
1980 GMC K1500 454/7.4 V8
1979 - 1986 GMC C2500 Suburban 454/7.4 V8
1975 - 1978 GMC C35 454/7.4 V8
1979 - 1986 GMC C3500 454/7.4 V8
1975 - 1980 Chevrolet C10 Suburban 454/7.4 V8
1975 - 1986 Chevrolet C20 454/7.4 V8
1975 - 1986 Chevrolet C20 Suburban 454/7.4 V8
1975 - 1986 Chevrolet C30 454/7.4 V8
1975 - 1978 GMC C25 454/7.4 V8
1979 - 1986 GMC C2500 454/7.4 V8
1975 - 1978 GMC C25 Suburban 454/7.4 V8
1976 - 1978 Chevrolet K5 Blazer 454/7.4 V8
1975 - 1980 Chevrolet C10 454/7.4 V8
1976 - 1978 Chevrolet K20 454/7.4 V8
1985 Chevrolet K20 Suburban 454/7.4 V8
1977 - 1986 Chevrolet K30 454/7.4 V8
1975 Chevrolet Malibu 454/7.4 V8
1976 - 1980 Chevrolet K10 454/7.4 V8
1976 Chevrolet G20 454/7.4 V8
1975 - 1976 Chevrolet G30 454/7.4 V8
1976 - 1978 GMC K25 454/7.4 V8
1976 - 1977 GMC K25 Suburban 454/7.4 V8
1987 - 1988 Chevrolet R30 454/7.4 V8
1989 Chevrolet R3500 454/7.4 V8
1987 - 1988 Chevrolet V30 454/7.4 V8
1989 Chevrolet V3500 454/7.4 V8
1975 - 1978 GMC C15 454/7.4 V8
1979 - 1980 GMC C1500 454/7.4 V8
1975 - 1978 GMC C15 Suburban 454/7.4 V8
1979 - 1980 GMC C1500 Suburban 454/7.4 V8
1987 - 1989 GMC V3500 454/7.4 V8
1979 - 1986 GMC K3500 454/7.4 V8
1987 - 1989 GMC R3500 454/7.4 V8
1975 GMC Sprint 454/7.4 V8
1977 Pontiac LeMans 403/6.6 V8
1977 - 1979 Pontiac Catalina 403/6.6 V8
1977 - 1979 Pontiac Firebird 403/6.6 V8
1977 Pontiac Grand LeMans 403/6.6 V8
1977 - 1979 Oldsmobile Delta 88 403/6.6 V8
1977 - 1978 Buick LeSabre 403/6.6 V8
1978 - 1979 Oldsmobile 98 403/6.6 V8
1978 - 1979 Oldsmobile Custom Cruiser 403/6.6 V8
1977 Buick Century 403/6.6 V8
1977 Oldsmobile Cutlass 403/6.6 V8
1977 Oldsmobile Cutlass Supreme 403/6.6 V8
1975 GMC Sprint 402/6.6 V8
1975 - 1978 GMC G25 400/6.6 V8
1979 - 1980 GMC G2500 400/6.6 V8
1975 - 1978 GMC G35 400/6.6 V8
1979 GMC G3500 400/6.6 V8
1975 - 1979 GMC Jimmy 400/6.6 V8
1975 - 1978 GMC K15 400/6.6 V8
1979 - 1980 GMC K1500 400/6.6 V8
1975 - 1978 GMC K15 Suburban 400/6.6 V8
1975 - 1977 Pontiac LeMans 400/6.6 V8
1976 - 1978 GMC C35 400/6.6 V8
1979 GMC C3500 400/6.6 V8
1976 GMC G15 400/6.6 V8
1979 GMC G1500 400/6.6 V8
1977 - 1978 Pontiac Catalina 400/6.6 V8
1975 - 1979 Pontiac Firebird 400/6.6 V8
1975 - 1977 Pontiac Grand LeMans 400/6.6 V8
1976 - 1980 Chevrolet C20 400/6.6 V8
1976 - 1980 Chevrolet C20 Suburban 400/6.6 V8
1976 - 1978 Chevrolet C30 400/6.6 V8
1976 - 1978 GMC C25 400/6.6 V8
1979 GMC C2500 400/6.6 V8
1978 GMC C25 Suburban 400/6.6 V8
1980 GMC C2500 Suburban 400/6.6 V8
1975 - 1979 Chevrolet K5 Blazer 400/6.6 V8
1976 - 1980 Chevrolet C10 400/6.6 V8
1975 - 1980 Chevrolet K20 400/6.6 V8
1975 - 1980 Chevrolet K20 Suburban 400/6.6 V8
1977 - 1980 Chevrolet K30 400/6.6 V8
1975 Chevrolet Laguna 400/
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: 8329725182

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4.1 ★★★★★
Based on 18 reviews
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Product Reviews
R
Verified Purchase
Restasis
Birmingham, US
★★★★★ 5
Best to buy both, even if u just need one
It's better buy both and to assure to get the right one and gamble into buying one and are buying it bc u got the wrong one. Works as intended
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 26, 2025
G
Verified Purchase
Gio C
Bozeman, US
★★★★★ 4
They work as they should
But they wouldn't work for what I needed. I purchased these but the Steam Deck to take stress off the top USB C port when charging, but they're a bit too small to fit. I can find other uses for them. They feel really well abs built to last. Cables and ports seem very secure when connected.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 14, 2024
W
Verified Purchase
William
Omaha, US
★★★★★ 5
Perfect fit
I use them for my moto g stylo 2023 and my Samsung s8 ultra tab. These fit well even with a case on them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 28, 2024
J
Verified Purchase
John
Lowell, US
★★★★★ 5
Great Product
Works as described. Very good!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 12, 2024
S
Scott
Charlottesville, US
★★★★★ 5
Nice to Have 90° Angle USB-C Adapters
The Herfair 180 Degree USB C Adapter is compact, simple to use, and fits snugly inside the USB C ports I've plugged it into. I got it to use with my Steam Deck, since the charging port comes out of the top of the device, and holding it with the cord sticking out of the top creates unneeded pressure. Something like the Nintendo Switch has the port coming out of the bottom, but then you can't comfortably rest the device in your lap. The benefit of using this adapter is that I'm now getting the best of both worlds. It extends just enough to let the cord freely travel down the back of the Deck, but it's compact enough that I can set the Deck down on a flat surface and the adapter doesn't touch the desk or tabletop. Even better, it fits right alongside the exhaust fan attachment that I use to keep the Deck cool. All in all, this adapter did exactly what I was hoping it would and fits so well that I can pretty much forget it's there unless I'm putting the Deck in its carrying case. I'm really glad to have this!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 4, 2024

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