The MSD Module Selectors allow you to choose two or three different rpm limits that can be activated at different times
J2A / J2B / J3 / J4 Plugs
1964-1967 Pontiac LeMans CID 364 CC 5967 6
Other oil pans may require crossmember trimming for clearance
Lessens the chance of cross-fire
QA1 5Q Series Twintube Front Shock - C3-R8 Valve - Black Zinc - Circle Track 5Q943-8 DX2100K The MSD Module Selectors allowQA1 5Q Series Circle Track Rebuildable Steel Twin Tube ShocksQA1 specializes in high performance suspension components, including shock absorbers, rod ends, spherical bearings, struts, springs, ball joints and other related items. With products to fit a wide variety of applications, they have solutions for the circle track, drag racing, street performance, and street rodding markets. At QA1, we believe vehicles were meant to be driven. From bolt on