Products Showing Parts for — {{ }}

No Results Showing Parts for — {{ }}
USD 12.99 12.99 49.99
Part #:

Daystar KU2004XBK Firewall Boot

Universal - Many Applications
Part #:
FROM 12.99
Ships from manufacturer (Usually in 1-3 Days)

An Email Will Be Sent With Expected Shipping Date After Purchase

Our Recommendations Compatible Products
Scroll to View More


Throw away those leaky rubber grommets! Daystars Firewall Boot is the BEST way to run wires, hoses, and other lines through your vehicles firewall. Simply drill a 1.25 diameter hole in the firewall and install the boot. Run your wires, trim the boot as necessary, and secure the assembly with a zip tie. Its that easy!

  • Eliminates air / water leaks 
  • Protects wires from sharp edges
  • Prevents wire chaffing and shorts
  • Works great for tubing and air lines, too!
  • 1.25 diameter hole required for installation.
  • A must have for lighting and gauge installations!
  • Fits a variety of wire thicknesses and bundles from 3/8 to 1
  • Safely and cleanly run wires through firewalls and bulkheads

Product Options

KU20040BK Single
KU20041BK 5 Pack


  • Manufacturer Name Daystar
  • Shipping Weight 1.00 lb.
  • Shipping Length 29 in.
  • Shipping Width 7 in.
  • Shipping Height 48 in.
  • Fuel Type Diesel / Gas
  • Warranty Yes
  • Warranty Info Limited Lifetime
  • Prop 65 WARNING: Cancer & Reproductive Harm -


No Reviews Yet!

Write a Review

Include Your Order Number For a Chance to Win a $100 Gift card

Overall Rating

Your Information

Email Address will not be made public.

Customer Photos

Customer Photos

See what others built Submit your photo

Questions and Answers

Ask XDP a Question about this product (Allow 24-48 hours for reply)

Most Popular Questions

What is the large end outside diameter of the grommet? I would like to use this product in a 1 and 7/16 hole. what is the outside diameter of the large end of the grommet?
View Staff Answer 
To install the DAYSTAR KU2004XBK FIREWALL BOOT a 1.25” diameter hole must be drilled.
XDP continues to closely monitor the COVID-19 (Coronavirus) outbreak. As an integral part of the automotive supply chain, at this point all call centers and distribution centers remain fully operational to ensure we keep vital service components flowing to vehicles used in transport of goods and emergency response. To ensure the health of our employees, families, and customers, we have made the following procedural changes:

  • UPDATE: Effective 6/1 Customer Service resumes normal business hours of M-F 8:30 – 9:00pm EST.
  • Effective 3/18 we have decided to temporarily close both of our retail stores in NJ and NV.
  • Our technical sales team remains available Mon-Fri 8:30am-9pm and Saturday 10:30am-7pm EST.
  • All employees have been encouraged to follow the CDC's recommendations at home and in the workplace.
The circumstances of this virus are fast moving, as such, we will continue to update you with any further operational adjustments as needed. As always, we value your business and appreciate your patience as we manage this situation together.