4-Port Heater & A/C Firewall Bulkhead

Name: 4-Port Heater & A/C Firewall Bulkhead
Brand: BILLET SPECIALTIES
SKU: 135-BLK66935
Price: 113.95 USD
Availability: InStock

^$113⁹⁵

Ships on Sep 14, 2026

Lowest Price Guarantee

A/C & Heater

4-Port Heater & A/C Firewall Bulkhead

(1) -6 AN Male to -6 AN Male Port

(1) -10 AN Male to -10 AN Male Ports

(2) -10 AN Male to 5/8 in. Hose Barb Port

6061-T6 Billet Aluminum

Black Anodized Finish

Fitment Notes:

Stainless heater hose applications will require AN to male o-ring adapters
Works with 5/8 in. heater hose
Hose end fittings sold separately
Push-on hose barb ports are for heater side only

Firewall Bulkhead Ports for a Professional Build

Billet Specialties Heater & Air Conditioning Bulkheads give your project vehicle's heat and A/C lines a custom professional appearance by cleaning up your engine bay. Precision machined from 6061-T6 billet aluminum, these bulkhead ports allow you to route multiple hoses in a confined space. Designed for heat, A/C or a combination of both, these billet bulkheads are engineered specifically for 5/8 in. inner diameter hose. Available in polished or black anodized finishes, hose end fittings sold separately.

Part TypeFirewall Bulkhead

Product LineBillet Specialties Heater & AC Bulkheads

BrandBILLET SPECIALTIES

Package Height1.75

Package Width6.0

Package Length7.75

Weight1.25 PG

Part CategoryAccessories

Bulkhead FinishBlack Anodized

Bulkhead Style4-port

QuantitySold individually

Bulkhead LocationFirewall