Moroso Adjustable Vacuum Advance Kit - 1975-+81 GM HEI Distributors R03P015 Mobil 1 Racing Oil has

Mobil 1 Racing Oil has been developed by ExxonMobil using more than 30 years of experience

44 in Long

and 375 automatic transmissions with a reverse valve body

1968-1985 Chevrolet K20 Suburban

385 Cranking amps

Moroso Adjustable Vacuum Advance Kit - 1975-+81 GM HEI Distributors R03P015 Mobil 1 Racing Oil hasAllows you to change the amount of ignition vacuum advance for maximum part throttle performance while preventing the harmful effects of spark knock (detonation) Dial in as much spark advance as conditions permit add more advance under light load conditions to improve throttle response and fuel economy, or limit spark advance in high compression engines and high load conditions to eliminate knock Built in stop prevents the adjustment screw from