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Vehicle Info NeededMSD IGNITIONPART NUMBER: 121-8677
Adjustable RPM Module 1,000-3,000 RPM
$5063$56.25You Save$5.62
3 left in stock
Ships on Sep 08, 2026
Lowest Price Guarantee- Adjustable RPM Module
- 1,000-3,000 RPM
Can not be used on the MSD Engine Governor (121-8725).
- MSD's Adjustable Low RPM Module allows you to dial-in any rpm between 1,000 and 3,000 rpm by turning a potentiometer. This module helps automatic transmission vehicles with an MSD 2-Step Module Selector to leave the starting line below 3,000 rpm.Features:
- Module is set at the factory with the adjusting screw turned all the way in which is the highest rpm
- One turn is roughly equal to 100 rpmNote: Solid core spark plug wires cannot be used.
Part TypeRPM Module Selector
Product LineMSD Adjustable Low RPM Module
BrandMSD IGNITION
Package Height1.4
Package Width6.1
Package Length7.5
Weight0.13 PG
Part CategoryPerformance Parts
Ignition Module Range (Rpm)1,000-3,000
Ignition Module FinishRed
QuantitySold individually
Ignition Module MaterialPlastic
Part FitmentUniversal
AdjustableYes
Vendor Part Number8677
Package Qty1
Package TypeEA
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