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JEGS Performance Products 40003

Adjustable Vacuum Advance For GM V8 HEI

JEGS Performance Products 40003

555-40003

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$18.99
$16.99
ON SALE - $2.00 OFF
JEGS Performance Products 40003 Adjustable Vacuum Advance For GM V8 HEI $16.99
Adjustable Vacuum Advance
  • For GM V8 HEI

  • JEGS Adjustable Vacuum Advance for HEI replaces the OE non-adjustable unit. Allows you to change the amount of ignition vacuum advance for maximum performance while preventing detonation. Improves fuel economy, throttle response, horsepower, and performance. Includes 3/32" Allen wrench and easy-to-follow instructions.

    40003 - JEGS Adjustable Vacuum Advance for HEI is rated 4.7 out of 5 by 3.
    Rated 5 out of 5 by from Works as advertised. I was not happy with the hot start function of the 350 HO crate engine I have in my GMC S15 pickup. I decide to install the HEI Adjustable Vacuum Advance to see if this may help the situation. The install and setup was super easy, took about 45 minutes. Results were excellent. Works as advertised.
    Date published: 2018-02-15
    Rated 5 out of 5 by from nice hard product to find nice product, hard to find other places, shipped very quick !
    Date published: 2016-04-09
    • y_2018, m_2, d_20, h_2
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