Product Summary

Timing Retard

  • It is nitrous and boost compatible
  • Has six preprogrammed timing tables for easy set-up
  • A rotary selector switch allows timing changes on the fly
  • Features a programmable step retard and has high speed data acquisition
  • Designed to fit most LS Engines and does not require a PC for basic functionality

Rebates Available

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Key Specs

MFG. Part #60143
BrandMSD
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Need To Know

Quick and Easy Returns

Return Policy

MSD 60143 Details

The demand for a powerful, reliable and easily adaptable ignition system for GM LS engines is growing higher and higher. MSD has answered this demand with an updated and improved version of the popular 6LS box. Whether using a stock crate engine or building a custom powerhouse, the MSD LS Ignition provides the control you need to achieve the performance you want.

Dial in the perfect tune for your LS using the easily adjustable preset timing curves or hookup to your computer and program a custom setup with our user friendly MSD View software. New features of the LS Ignition include; high speed data acquisition, an optional coolant temperature sensor input, idle timing control, as well as individual cylinder timing. These features are in addition to the existing programmable step retard, launch retard and RPM rev limiters from its predecessor.

Features:

  • Black in color
  • Fits most LS Engines
  • No PC required for basic functionality
  • Six preprogrammed timing tables for easy set-up
  • Rotary selector switch allows timing changes on the fly
  • Nitrous and boost compatible
  • High speed data acquisition
  • Fully Sealed direct plugin connectors
  • Programmable step retard
  • Launch and max rev limiters
  • Optional coolant temperature sensor input
  • Launch retard
  • Idle timing control
  • Individual cylinder timing
  • Compatible with all MSD, Accel and GM LS coils

Notes:

This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing Vehicles

Charts

Rebates

Holley Up to 15% Off Select Parts September Promo

Holley Up to 15% Off Select Parts September PromoHolley15%offseptemberPromo

Holley's Up to 15% Off Select Parts September Promo, running from August 31, 2026, through September 27, 2026. For a limited time, customers can save up to 15% off on select Holley parts, making it the perfect opportunity to upgrade your ride with premium Holley branded parts. Purchases must be made between August 31, 2026 and September 27, 2026. This limited-time offer applies to qualifying Holley branded parts purchased during the promotional period.

CARB Warning

Follow EPA, CARB, and state regulations for engine changes

Emissions warning: this part is for vehicle engine changes, not direct oem engine replacements. In California, engine changes are legal when done in compliance with California bureau of automotive repairs (bar) engine change policy. For assistance, call bar referee at: (800) 622-7733. And see https://bar.Ca.Gov/consumer/smog_check_program/engine_changes. All customers must comply with federal epa mobile source enforcement memorandum no. 1a (and addendum) and all applicable state regulations when conducting engine changes. Improper installation and/or use of this part in California may subject the installer and/or owner to a $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 laws of all states for use of this engine change part on makes or models of vehicles that render them noncompliant with applicable state and/or federal emission laws with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine

MSD 60143 Specifications

KEY SPECS
MFG. Part #60143
BrandMSD
GENERAL
Timing RetardYes
GTIN Code085132601431
Sold in QuantityEach
NotesSuitable for 24x and 58x crank trigger engines.
Emission Code3

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Very pleased

5.0

7 months ago

Wally

Denver

Verified

Used this LS Msd for a 5.3 truck engine. Purdy much plug and play. Came with everything to plug in sensors and coils. It has 2 different harnesses, one for each 24x and 58x reluctor wheel depending on your engine. I set the dial to truck, hit the starter and it fired immediately. Was super happy.

Would Recommend

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