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Battery Master Cut-Off (Kill) Switches

We carry only the highest quality master battery switches. Don't risk a DNF with an unreliable clone.

If your car has an alternator, you must use a switch with a secondary set of contacts (such as Part No. 4430 or LA45782) to prevent the energized alternator from continuing to power the engine when the switch is turned off. Cars with total-loss electrical systems can use any of our single-circuit switches.

Note: SCCA now requires insulation on all terminals on battery master switches. Our Part No. 4435 Boots are sized to fit the main 3/8" stud terminals, and our Part No. 3929 Tape can be used on the secondary terminals of alternator switches.

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Lucas-Style Master Battery Cutoff Switch

Lucas-Style Master Battery Cutoff Switch

Many older race cars are set up to use a Lucas-style Master Battery Cut-off Switch, and nothing else fits properly. Our reliable, period-correct switch replaces the original Lucas perfectly.

Image
Part No.
Description
Price
Status
Master Battery Cutoff Switch with Alternator Protection

4430 

Master Battery Cutoff Switch with Alternator Protection

$69.99In Stock
Single Circuit Master Battery Cutoff Switch

4431 

Single Circuit Master Battery Cutoff Switch

$39.99In Stock
Hella Master Battery Cut-Off Switch

4439-001 

Hella Master Battery Cut-Off Switch

$57.99In Stock
Replacement Key for Battery Switches

4433 

Replacement Key for Battery Switches

$15.49In Stock
Replacement Resistor for 4430 Switch

4434 

Replacement Resistor for 4430 Switch

$7.59In Stock
Master Switch Mounting Tab

4375-001 

Master Switch Mounting Tab

$3.99In Stock
Lucas-Style Master Battery Cutoff Switch

4436 

Lucas-Style Master Battery Cutoff Switch

$99.99In Stock
Longacre HD Battery & Alternator Disconnect Switch, no panel

LA45782 

Longacre HD Battery & Alternator Disconnect Switch, no panel

$69.99In Stock
Longacre Battery & Alternator Disconnect Switch, no panel

LA4578 

Longacre Battery & Alternator Disconnect Switch, no panel

$29.99In Stock
Longacre 2-Terminal Battery Disconnect Switch with Panel

LA45761 

Longacre 2-Terminal Battery Disconnect Switch with Panel

$33.49In Stock
Longacre 2-Terminal Battery Disconnect Switch w/ Black Panel

LA45760 

Longacre 2-Terminal Battery Disconnect Switch w/ Black Panel

$33.49In Stock
OMP Spare Key for OMP EA/460 2-Terminal Switch

OMP-EA463 

OMP Spare Key for OMP EA/460 2-Terminal Switch

$10.00In Stock
OMP Spare Key for OMP EA/462 6-Terminal Switch

OMP-EA464 

OMP Spare Key for OMP EA/462 6-Terminal Switch

$12.00In Stock
Insulating Boot for Battery Cut-Off Switch Terminal

4435-Color 

Insulating Boot for Battery Cut-Off Switch Terminal

$2.49In Stock
Self Bonding Silicone Tape, 1 inch  x 36 ft roll

3929 

Self Bonding Silicone Tape, 1 inch x 36 ft roll

$27.99In Stock
Loctite Insulating and Sealing Wrap

LT-1212164 

Loctite Insulating and Sealing Wrap

$8.59In Stock
SCCA  Off  Decal for Master Switch

3356 

SCCA Off Decal for Master Switch

$0.99In Stock
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