- Ignition & Electrical
- Wiring, Wiring Harnesses, Switches, Connectors, Breakers & Relays
- Painless CirKit Boss Auxiliary Fuse Blocks
Painless Performance CirKit Boss Auxiliary Fuse Blocks provide you with the protection you need! Electrical accessories can send voltage spikes through your system, damaging everything from light bulbs to diagnostic computers. The safe way to add electrical accessories is with the Painless CirKit Boss, the first circuit isolator containing both constant and ignition hot circuits. No more tapping into an existing wire or a spare circuit at the fuse block. Using an add-on, relay-activated fuse block is the safe way.
Show More
Only a small activation wire from any ignition source is needed to power the relay that turns on the fuse block. All CirKit Boss models are made using TXL cross-link polyethylene wire rated to 275 degrees F at 600 volts. All wires are factory machine terminated. Circuits are individually fused for up to 20 amp applications. CirKit Boss includes an in-line circuit breaker, relay, mounting hardware, and terminals.
Features:
- Easy Installation
- Protects Your OE Warranty
- Safely Adds Ignition Hot and Constant Hot Circuits
Filter Results
AVAILABILITY
PART TYPE
PART TYPE
BRAND
BRAND
Part Category
Vendor Part Number
Part Fitment
Fuse Box Cover Finish
RATING
PRICE
3-Circuit Auxiliary Fuse Block Kits
Painless Performance Products 70103
Painless Performance Products CirKit Boss Auxiliary Fuse Block Kit Perfect For Use Under Normal Conditions
CirKit Boss Auxiliary Fuse Block KitPerfect For Use Under Normal Conditions (1) 30-Amp Relay (SPST) (1) 50-Amp Circuit Breaker
3-Circuit: (1) Constant-Hot (2) Ignition-Hot
3-Circuit:
View Details
$72.99
Ships in 24hrs
Lowest Price Guarantee
Painless Performance Products 70113
Painless Performance Products CirKit Boss Auxiliary Fuse Block Kit Perfect For Use Under Normal Conditions
CirKit Boss Auxiliary Fuse Block KitPerfect For Use Under Normal Conditions (1) 40-Amp Relay (SPST) (1) 40-Amp Circuit Breaker
3-Circuit: (3) Ignition-Hot
3-Circuit:
View Details
$72.99
(1)
Ships Today
Lowest Price Guarantee
Painless Performance Products 70114
Painless Performance Products CirKit Boss Auxiliary Fuse Block Kit Perfect For Use Under Normal Conditions
CirKit Boss Auxiliary Fuse Block KitPerfect For Use Under Normal Conditions (1) 70-Amp Relay (SPST)
3-Circuit: (3) Ignition-Hot
3-Circuit:
View Details
$97.99
Ships in 24hrs
Lowest Price Guarantee
3-Circuit Weather Resistant Auxiliary Fuse Block Kits
Painless Performance Products 70203
Painless Performance Products CirKit Boss Weather Resistant Auxiliary Fuse Block Kit Extreme Use Where Moisture/Dust Resistance is Important
CirKit Boss Weather Resistant Auxiliary Fuse Block KitExtreme Use Where Moisture/Dust Resistance is Important Includes Cover for Fuses (1) 30-Amp Relay (SPST)
3-Circuit: (1) Constant-Hot (2) Ignition-Hot
3-Circuit:
View Details
$94.99
(1)
Ships on 04/04/25
Lowest Price Guarantee
Painless Performance Products 70213
Painless Performance Products CirKit Boss Weather Resistant Auxiliary Fuse Block Kit Extreme Use Where Moisture/Dust Resistance is Important
CirKit Boss Weather Resistant Auxiliary Fuse Block KitExtreme Use Where Moisture/Dust Resistance is Important Includes Cover for Fuses (1) 40-Amp Relay (SPST)
3-Circuit: (3) Ignition-Hot
3-Circuit:
View Details
$89.99
(1)
Ships Today
Lowest Price Guarantee
7-Circuit Auxiliary Fuse Block Kits
Painless Performance Products 70107
Painless Performance Products CirKit Boss Auxiliary Fuse Block Kit - 7-Circuit [(3) Constant, (4) Ignition - 12 V]
CirKit Boss Auxiliary Fuse Block Kit7-Circuit [(3) Constant, (4) Ignition - 12 V]
View Details
$89.99
(8)
Ships Today
Lowest Price Guarantee
Painless Performance Products 70117
Painless Performance Products CirKit Boss Auxiliary Fuse Block Kit Perfect For Use Under Normal Conditions
CirKit Boss Auxiliary Fuse Block KitPerfect For Use Under Normal Conditions (2) 40-Amp Relays (SPST)
7-Circuit: (7) Ignition-Hot
7-Circuit:
View Details
$105.99
(1)
Ships on 04/04/25
Lowest Price Guarantee
Painless Performance Products 70118
Painless Performance Products CirKit Boss Auxiliary Fuse Block Kit Perfect For Use Under Normal Conditions
CirKit Boss Auxiliary Fuse Block KitPerfect For Use Under Normal Conditions (2) 70-Amp Relays (SPST)
7-Circuit: (7) Ignition-Hot
7-Circuit:
View Details
$158.99
Ships on 04/04/25
Lowest Price Guarantee
7-Circuit Weather Resistant Auxiliary Fuse Block Kits
Painless Performance Products 70207
Painless Performance Products 7-Circuit CirKit Boss Auxiliary Fuse Block Kit - Weather Resistant [3 Constant & 4 Ignition]
CirKit Boss Auxiliary Fuse Block KitWeather Resistant 7-Circuits [(3) Constant, (4) Ignition]
View Details
$107.99
(3)
Ships Today
Lowest Price Guarantee
Painless Performance Products 70217
Painless Performance Products CirKit Boss Weather Resistant Auxiliary Fuse Block Kit Extreme Use Where Moisture/Dust Resistance is Important
CirKit Boss Weather Resistant Auxiliary Fuse Block KitExtreme Use Where Moisture/Dust Resistance is Important Includes Cover for Fuses (2) 40-Amp Relays (SPST)
7-Circuit: (7) Ignition-Hot
7-Circuit:
View Details
$129.99
(2)
Ships Today
Lowest Price Guarantee
Replacement Rubber Fuseblock Covers
Painless Performance Products 70120
Painless Performance Products Replacement Rubber Fuseblock Cover 3-Circuit CirKit Boss
Replacement Rubber Fuseblock Cover 3-Circuit CirKit Boss
View Details
$11.99
Ships on 03/27/25
Lowest Price Guarantee