PerTronix Advance Spring Kit for PTX Billet Distributors 2010042 The spring holds the button

The spring holds the button captive so that it can't be dropped underneath the car or into some hard-to-get-at area of the chassis

1991-1994 Isuzu Pickup

1967-1968 Chevrolet Chevelle

COMP Ford 429-460 Std HeadThe COMP Cams philosophy has never changed: make the highest performing products possible and lead the industry in technological development

1973-1974 GMC P25/P2500 Van

PerTronix Advance Spring Kit for PTX Billet Distributors 2010042 The spring holds the buttonPerTronix D700700 Advance Spring Kit Flame Thrower Billet Distributor. Features: Performance mechanical advance springs. Warranty: 30 months electronics limited 1 year mechanical.; . Pertronix manufactures a broad range of ignition components, including distributor caps and rotors, and related components. They are best known for their point to electric ignition conversion kits, which are available for wide range of domestic and import applications.