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Key Specs

MFG. Part #558-416
BrandHolley
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Holley 558-416 Details

Holley EFI LS main harnesses have a MAP sensor connecter designed for use with an LS1/2 style MAP sensor. The 558-416 is an adapter harness that can be used to adapt any LS harness that uses a LS1/2 MAP sensor connection to a LS3 MAP, which is recommended for this manifold.

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Save 10% instantly on select products across the Holley family of performance brands during the annual Holley I.R.S.Tax Sale. Instant rebate period runs from February 17, 2026 through March 29, 2026.

CARB Warning

For race/ off road use or for use on pre-1966 vehicles.

Emissions warning: this part only legal for sale or use in California for racing (competition) vehicles which may never be used, registered, or licensed for use upon a public highway, or if installed in vehicles model-year 1965 or older; motorcycles model-year 1977 or older; or off-highway recreational vehicles (such as off-road motorcycles and all-terrain vehicles) model-year 1996 and older. Any other use renders the vehicle tampered and not legal for use on California public highways (any public street or roadway, public dirt road, public park, or publicly maintained right of way open to the use of the public for vehicular travel). Violations subject to $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and the laws of all other states with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine.

Holley 558-416 Specifications

KEY SPECS
MFG. Part #558-416
BrandHolley
GENERAL
GTIN Code090127686546
Sold in QuantityEach

Ratings & Reviews

5

4 Reviews

Overall Assessment

Customers appreciate the flawless functioning of our product for running Gen 4 style map sensors in Gen 3; it particularly excels in enabling hassle-free modifications. Though some wishes for in-depth guidance, the necessary instructions and data for tuning the sensor can be conveniently accessed online. The product's quality outshines others, proving its practical usage and reliability. Users highly recommend it due to its exceptional usability and strong performance.

5

4 reviews

5

4

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Filter by Ratings

Yes

5.0

3 months ago

Sam

Tampa fl

Verified

I'm doing a terminator X on my LS one so I need this part to help make it run like it should

Would Recommend

Got the job done.

5.0

4 months ago

Rob L.

Phoenix, AZ

Verified

This made it possible to run my 2 bar MAP sensor, but it did take some tuning work by the ever reliable Holley customer support crew.

Would Recommend

Works flawlessly to run a Gen 4 style map sensor in a Gen 3

5.0

4 years ago

Aaron

Nebraska City, NE

Verified

Should come with better instructions for tuning the map sensor and a list of common map sensor part numbers and their respective values. However, most of that information is able to be found online with a little patience.

Would Recommend

Great easy adapter

5.0

6 years ago

freeclear

deer park

Verified

These Adapters make it so easy for mods...

Would Recommend

Showing 4 of 4 reviews

Fitment

  • GM LSA

  • 6.2 Chevy LS V8

  • 6.2 Chevy LS V8

  • 6.2 Chevy LS V8

  • GM LS3

  • GM LS3

  • GM LS3

  • 6.2 Chevy LS V8

  • 6.2 Chevy LS V8

  • GM LS3

Customer Impersonation Script